<?xml version="1.0" encoding="UTF-8"?>

<!--XBRL Document Created with Wdesk from Workiva-->
<!--Copyright 2021 Workiva-->
<!--r:b1502814-b242-449b-ad31-71b4607b7919,g:ca6915b7-8b78-417c-95da-56692abc7e1f-->
<link:linkbase xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd">
  <link:roleRef roleURI="http://www.rubiconproject.com/role/CoverPage" xlink:type="simple" xlink:href="rubi-20210331.xsd#CoverPage"/>
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/CoverPage" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.rubiconproject.com/role/CondensedConsolidatedBalanceSheets" xlink:type="simple" xlink:href="rubi-20210331.xsd#CondensedConsolidatedBalanceSheets"/>
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/CondensedConsolidatedBalanceSheets" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Liabilities_d7c80ed4-026c-4424-af42-5a921610d6a5" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_Liabilities"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesCurrent_e0863fa2-e651-4fe6-bb7c-e6631e2e3f68" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LiabilitiesCurrent"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_d7c80ed4-026c-4424-af42-5a921610d6a5" xlink:to="loc_us-gaap_LiabilitiesCurrent_e0863fa2-e651-4fe6-bb7c-e6631e2e3f68" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredIncomeTaxLiabilitiesNet_8c77af8b-520d-4a81-8aca-7d36abbf306c" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DeferredIncomeTaxLiabilitiesNet"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_d7c80ed4-026c-4424-af42-5a921610d6a5" xlink:to="loc_us-gaap_DeferredIncomeTaxLiabilitiesNet_8c77af8b-520d-4a81-8aca-7d36abbf306c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtNoncurrent_8469a8ba-a209-473a-b5d6-56629cb06421" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LongTermDebtNoncurrent"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_d7c80ed4-026c-4424-af42-5a921610d6a5" xlink:to="loc_us-gaap_LongTermDebtNoncurrent_8469a8ba-a209-473a-b5d6-56629cb06421" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiabilityNoncurrent_4be069d0-ac16-403d-b153-5b9cecd8afed" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OperatingLeaseLiabilityNoncurrent"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_d7c80ed4-026c-4424-af42-5a921610d6a5" xlink:to="loc_us-gaap_OperatingLeaseLiabilityNoncurrent_4be069d0-ac16-403d-b153-5b9cecd8afed" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherLiabilitiesNoncurrent_d62cb38d-6556-4d41-855a-b4206e646b91" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OtherLiabilitiesNoncurrent"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_d7c80ed4-026c-4424-af42-5a921610d6a5" xlink:to="loc_us-gaap_OtherLiabilitiesNoncurrent_d62cb38d-6556-4d41-855a-b4206e646b91" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquity_97150a4f-8118-4e62-879c-54e02dc381b4" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquity"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Liabilities_58ae4590-c46e-492d-9412-f8cb2a9afa43" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_Liabilities"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_97150a4f-8118-4e62-879c-54e02dc381b4" xlink:to="loc_us-gaap_Liabilities_58ae4590-c46e-492d-9412-f8cb2a9afa43" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommitmentsAndContingencies_bed00f7f-5edb-460f-8241-0c8f7f9ebcef" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CommitmentsAndContingencies"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_97150a4f-8118-4e62-879c-54e02dc381b4" xlink:to="loc_us-gaap_CommitmentsAndContingencies_bed00f7f-5edb-460f-8241-0c8f7f9ebcef" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_9a092cdf-45f0-499c-8b12-00b50612f6ca" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StockholdersEquity"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_97150a4f-8118-4e62-879c-54e02dc381b4" xlink:to="loc_us-gaap_StockholdersEquity_9a092cdf-45f0-499c-8b12-00b50612f6ca" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesCurrent_cddefa14-7169-4627-b43e-926a3f531c77" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LiabilitiesCurrent"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent_54fc72e1-693f-4179-90f5-43af67336b4e" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_cddefa14-7169-4627-b43e-926a3f531c77" xlink:to="loc_us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent_54fc72e1-693f-4179-90f5-43af67336b4e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiabilityCurrent_84c1c176-5ddb-470d-9656-b762c6ea5b9b" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OperatingLeaseLiabilityCurrent"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_cddefa14-7169-4627-b43e-926a3f531c77" xlink:to="loc_us-gaap_OperatingLeaseLiabilityCurrent_84c1c176-5ddb-470d-9656-b762c6ea5b9b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherLiabilitiesCurrent_0c7ed0cc-271c-44bb-a544-75055589f9e9" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OtherLiabilitiesCurrent"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_cddefa14-7169-4627-b43e-926a3f531c77" xlink:to="loc_us-gaap_OtherLiabilitiesCurrent_0c7ed0cc-271c-44bb-a544-75055589f9e9" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_dad50945-665c-4743-ba22-10a018b30df1" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StockholdersEquity"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PreferredStockValue_477a1c4c-1a5a-444a-8c38-ff2510126ba7" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PreferredStockValue"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_dad50945-665c-4743-ba22-10a018b30df1" xlink:to="loc_us-gaap_PreferredStockValue_477a1c4c-1a5a-444a-8c38-ff2510126ba7" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockValue_75609ff5-ee5b-4a4b-a387-9b8465288d8a" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CommonStockValue"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_dad50945-665c-4743-ba22-10a018b30df1" xlink:to="loc_us-gaap_CommonStockValue_75609ff5-ee5b-4a4b-a387-9b8465288d8a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdditionalPaidInCapital_e4293feb-0f2f-444a-b063-da44213fa8e9" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AdditionalPaidInCapital"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_dad50945-665c-4743-ba22-10a018b30df1" xlink:to="loc_us-gaap_AdditionalPaidInCapital_e4293feb-0f2f-444a-b063-da44213fa8e9" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_ce14a6eb-ec51-42f5-b4ba-cce2d991d894" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_dad50945-665c-4743-ba22-10a018b30df1" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_ce14a6eb-ec51-42f5-b4ba-cce2d991d894" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsAccumulatedDeficit_e1afcb8f-3403-4f40-b073-ae95fb173cdb" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RetainedEarningsAccumulatedDeficit"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_dad50945-665c-4743-ba22-10a018b30df1" xlink:to="loc_us-gaap_RetainedEarningsAccumulatedDeficit_e1afcb8f-3403-4f40-b073-ae95fb173cdb" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsCurrent_09b97d1a-b056-4983-8b5e-22a928f21f4f" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AssetsCurrent"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_4ae33cb6-6c97-496a-b321-81a37883288d" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_09b97d1a-b056-4983-8b5e-22a928f21f4f" xlink:to="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_4ae33cb6-6c97-496a-b321-81a37883288d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsReceivableNetCurrent_4d39048b-fb94-47ee-9149-6b33bd47eb2b" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AccountsReceivableNetCurrent"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_09b97d1a-b056-4983-8b5e-22a928f21f4f" xlink:to="loc_us-gaap_AccountsReceivableNetCurrent_4d39048b-fb94-47ee-9149-6b33bd47eb2b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_d108875b-b51d-4a1c-b7e5-6d4cf84a5e38" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PrepaidExpenseAndOtherAssetsCurrent"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_09b97d1a-b056-4983-8b5e-22a928f21f4f" xlink:to="loc_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_d108875b-b51d-4a1c-b7e5-6d4cf84a5e38" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Assets_aa42e2d0-5ae5-43c3-8843-91e065011513" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_Assets"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsCurrent_9a2ab1a1-8c12-4a15-bb50-4ab0e05ea227" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AssetsCurrent"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_aa42e2d0-5ae5-43c3-8843-91e065011513" xlink:to="loc_us-gaap_AssetsCurrent_9a2ab1a1-8c12-4a15-bb50-4ab0e05ea227" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_a4ff591d-145c-444f-98fa-545638556e41" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PropertyPlantAndEquipmentNet"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_aa42e2d0-5ae5-43c3-8843-91e065011513" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentNet_a4ff591d-145c-444f-98fa-545638556e41" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseRightOfUseAsset_0ad09f95-fa47-4962-a0b4-a1e919884147" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OperatingLeaseRightOfUseAsset"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_aa42e2d0-5ae5-43c3-8843-91e065011513" xlink:to="loc_us-gaap_OperatingLeaseRightOfUseAsset_0ad09f95-fa47-4962-a0b4-a1e919884147" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_rubi_InternalUseSoftwareDevelopmentCostsNet_d4f03a08-0650-44f7-9ddc-18064cdb2466" xlink:href="rubi-20210331.xsd#rubi_InternalUseSoftwareDevelopmentCostsNet"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_aa42e2d0-5ae5-43c3-8843-91e065011513" xlink:to="loc_rubi_InternalUseSoftwareDevelopmentCostsNet_d4f03a08-0650-44f7-9ddc-18064cdb2466" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_384e56fd-18d2-4a28-959c-d5304383be7c" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IntangibleAssetsNetExcludingGoodwill"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_aa42e2d0-5ae5-43c3-8843-91e065011513" xlink:to="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_384e56fd-18d2-4a28-959c-d5304383be7c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssetsNoncurrent_1bc48ddb-a658-4e18-9e8d-e692c95e0a6a" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OtherAssetsNoncurrent"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_aa42e2d0-5ae5-43c3-8843-91e065011513" xlink:to="loc_us-gaap_OtherAssetsNoncurrent_1bc48ddb-a658-4e18-9e8d-e692c95e0a6a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Goodwill_8f78fc89-f03a-4b35-9abb-8a95f5e9c7db" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_Goodwill"/>
    <link:calculationArc order="7" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_aa42e2d0-5ae5-43c3-8843-91e065011513" xlink:to="loc_us-gaap_Goodwill_8f78fc89-f03a-4b35-9abb-8a95f5e9c7db" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.rubiconproject.com/role/CondensedConsolidatedBalanceSheetsParenthetical" xlink:type="simple" xlink:href="rubi-20210331.xsd#CondensedConsolidatedBalanceSheetsParenthetical"/>
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/CondensedConsolidatedBalanceSheetsParenthetical" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.rubiconproject.com/role/CondensedConsolidatedStatementsofOperations" xlink:type="simple" xlink:href="rubi-20210331.xsd#CondensedConsolidatedStatementsofOperations"/>
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/CondensedConsolidatedStatementsofOperations" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostsAndExpenses_ae541ba0-d320-4452-81c8-7ec61a37b5dc" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CostsAndExpenses"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfRevenue_d0ff7ea4-a143-4fe5-8007-9d924d7a6b86" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CostOfRevenue"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CostsAndExpenses_ae541ba0-d320-4452-81c8-7ec61a37b5dc" xlink:to="loc_us-gaap_CostOfRevenue_d0ff7ea4-a143-4fe5-8007-9d924d7a6b86" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SellingAndMarketingExpense_ef0d6735-9aa8-4f18-ba92-361bf1315dd7" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SellingAndMarketingExpense"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CostsAndExpenses_ae541ba0-d320-4452-81c8-7ec61a37b5dc" xlink:to="loc_us-gaap_SellingAndMarketingExpense_ef0d6735-9aa8-4f18-ba92-361bf1315dd7" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ResearchAndDevelopmentExpense_4cd32f51-63e0-43fa-ab32-98827e3861ce" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ResearchAndDevelopmentExpense"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CostsAndExpenses_ae541ba0-d320-4452-81c8-7ec61a37b5dc" xlink:to="loc_us-gaap_ResearchAndDevelopmentExpense_4cd32f51-63e0-43fa-ab32-98827e3861ce" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GeneralAndAdministrativeExpense_ed0bfe78-a41b-46b2-9010-6f2da5da5114" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_GeneralAndAdministrativeExpense"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CostsAndExpenses_ae541ba0-d320-4452-81c8-7ec61a37b5dc" xlink:to="loc_us-gaap_GeneralAndAdministrativeExpense_ed0bfe78-a41b-46b2-9010-6f2da5da5114" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_rubi_RestructuringChargesAndBusinessCombinationAcquisitionRelatedCosts_bd31fd3a-4618-4a60-9d46-9e9368239c92" xlink:href="rubi-20210331.xsd#rubi_RestructuringChargesAndBusinessCombinationAcquisitionRelatedCosts"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CostsAndExpenses_ae541ba0-d320-4452-81c8-7ec61a37b5dc" xlink:to="loc_rubi_RestructuringChargesAndBusinessCombinationAcquisitionRelatedCosts_bd31fd3a-4618-4a60-9d46-9e9368239c92" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_c754e9a3-8bc4-41f9-a5b4-4f284a5427fe" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingIncomeLoss_6ecb40d7-c2db-4018-9d00-bb8711d72ad2" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OperatingIncomeLoss"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_c754e9a3-8bc4-41f9-a5b4-4f284a5427fe" xlink:to="loc_us-gaap_OperatingIncomeLoss_6ecb40d7-c2db-4018-9d00-bb8711d72ad2" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NonoperatingIncomeExpense_91a1398f-9995-4884-95fe-7272cb7ad09b" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_NonoperatingIncomeExpense"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_c754e9a3-8bc4-41f9-a5b4-4f284a5427fe" xlink:to="loc_us-gaap_NonoperatingIncomeExpense_91a1398f-9995-4884-95fe-7272cb7ad09b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingIncomeLoss_ef5bc82e-9472-4afb-8b46-3971333a890e" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OperatingIncomeLoss"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_a16da7a5-f125-4436-8ab3-212aa3063524" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingIncomeLoss_ef5bc82e-9472-4afb-8b46-3971333a890e" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_a16da7a5-f125-4436-8ab3-212aa3063524" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostsAndExpenses_923347d1-0109-476d-b084-8cded70658d3" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CostsAndExpenses"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingIncomeLoss_ef5bc82e-9472-4afb-8b46-3971333a890e" xlink:to="loc_us-gaap_CostsAndExpenses_923347d1-0109-476d-b084-8cded70658d3" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_ddc1cd47-9a22-4fb9-9d7d-85585cb0538a" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_NetIncomeLoss"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_4fe2c513-d38b-43ac-994e-02db09112731" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLoss_ddc1cd47-9a22-4fb9-9d7d-85585cb0538a" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_4fe2c513-d38b-43ac-994e-02db09112731" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_2abe3b01-387c-4f25-9121-921fec21b267" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLoss_ddc1cd47-9a22-4fb9-9d7d-85585cb0538a" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_2abe3b01-387c-4f25-9121-921fec21b267" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NonoperatingIncomeExpense_26597e35-42de-4b3d-857e-c662caf25908" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_NonoperatingIncomeExpense"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestIncomeExpenseNet_d2464699-1d3e-4dd0-91a2-59aa3ec60453" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_InterestIncomeExpenseNet"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NonoperatingIncomeExpense_26597e35-42de-4b3d-857e-c662caf25908" xlink:to="loc_us-gaap_InterestIncomeExpenseNet_d2464699-1d3e-4dd0-91a2-59aa3ec60453" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherOperatingIncome_686e6af8-d3b1-46dd-af9a-20c12683e9ef" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OtherOperatingIncome"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NonoperatingIncomeExpense_26597e35-42de-4b3d-857e-c662caf25908" xlink:to="loc_us-gaap_OtherOperatingIncome_686e6af8-d3b1-46dd-af9a-20c12683e9ef" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignCurrencyTransactionGainLossBeforeTax_85d533f8-7bf5-4f89-a703-5f5e594330ec" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ForeignCurrencyTransactionGainLossBeforeTax"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NonoperatingIncomeExpense_26597e35-42de-4b3d-857e-c662caf25908" xlink:to="loc_us-gaap_ForeignCurrencyTransactionGainLossBeforeTax_85d533f8-7bf5-4f89-a703-5f5e594330ec" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.rubiconproject.com/role/CondensedConsolidatedStatementsofComprehensiveLoss" xlink:type="simple" xlink:href="rubi-20210331.xsd#CondensedConsolidatedStatementsofComprehensiveLoss"/>
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/CondensedConsolidatedStatementsofComprehensiveLoss" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ComprehensiveIncomeNetOfTax_938b5015-f7b2-4335-9b7c-f07db927857c" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ComprehensiveIncomeNetOfTax"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_d84e7dae-642c-4d8a-af29-fccafbdaa988" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_NetIncomeLoss"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_ComprehensiveIncomeNetOfTax_938b5015-f7b2-4335-9b7c-f07db927857c" xlink:to="loc_us-gaap_NetIncomeLoss_d84e7dae-642c-4d8a-af29-fccafbdaa988" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_3fe02d6d-ecb4-4295-accf-8de9bdc5db10" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_ComprehensiveIncomeNetOfTax_938b5015-f7b2-4335-9b7c-f07db927857c" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_3fe02d6d-ecb4-4295-accf-8de9bdc5db10" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_bb5168e5-4cd9-41f4-b3ae-8d5eb1686b82" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent_0a256471-ddcc-4132-afae-d1bb3f0696a3" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_bb5168e5-4cd9-41f4-b3ae-8d5eb1686b82" xlink:to="loc_us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent_0a256471-ddcc-4132-afae-d1bb3f0696a3" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.rubiconproject.com/role/CondensedConsolidatedStatementsofStockholdersEquity" xlink:type="simple" xlink:href="rubi-20210331.xsd#CondensedConsolidatedStatementsofStockholdersEquity"/>
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/CondensedConsolidatedStatementsofStockholdersEquity" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.rubiconproject.com/role/CondensedConsolidatedStatementsofCashFlows" xlink:type="simple" xlink:href="rubi-20210331.xsd#CondensedConsolidatedStatementsofCashFlows"/>
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/CondensedConsolidatedStatementsofCashFlows" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_d357c9fc-8392-4109-9c83-fab812a06508" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_5220247b-30ec-4102-8232-3182b91d98b3" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_d357c9fc-8392-4109-9c83-fab812a06508" xlink:to="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_5220247b-30ec-4102-8232-3182b91d98b3" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_06e6c3d5-7e43-4cf0-a01a-f1bb05aaa7ac" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_d357c9fc-8392-4109-9c83-fab812a06508" xlink:to="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_06e6c3d5-7e43-4cf0-a01a-f1bb05aaa7ac" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_f303c806-9977-472a-bb70-8c92a14bbbe7" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_d357c9fc-8392-4109-9c83-fab812a06508" xlink:to="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_f303c806-9977-472a-bb70-8c92a14bbbe7" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_f26f5448-d333-4f6a-a0a9-d89e8a4bd6f3" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_d357c9fc-8392-4109-9c83-fab812a06508" xlink:to="loc_us-gaap_EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_f26f5448-d333-4f6a-a0a9-d89e8a4bd6f3" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_b037f2bf-9b2f-4640-8c55-d0f05e309410" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_6f4cc519-1f32-4a0b-99ac-f312473b4ede" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_NetIncomeLoss"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_b037f2bf-9b2f-4640-8c55-d0f05e309410" xlink:to="loc_us-gaap_NetIncomeLoss_6f4cc519-1f32-4a0b-99ac-f312473b4ede" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DepreciationDepletionAndAmortization_e8739a44-bdf6-4a9d-b9aa-e634184736a9" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DepreciationDepletionAndAmortization"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_b037f2bf-9b2f-4640-8c55-d0f05e309410" xlink:to="loc_us-gaap_DepreciationDepletionAndAmortization_e8739a44-bdf6-4a9d-b9aa-e634184736a9" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensation_b17fa2c2-21ca-40f9-bdaf-7bc3d7ba3446" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensation"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_b037f2bf-9b2f-4640-8c55-d0f05e309410" xlink:to="loc_us-gaap_ShareBasedCompensation_b17fa2c2-21ca-40f9-bdaf-7bc3d7ba3446" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainLossOnSaleOfPropertyPlantEquipment_f8cb6236-6ecc-4984-beb9-2a7d96077e3f" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_GainLossOnSaleOfPropertyPlantEquipment"/>
    <link:calculationArc order="4" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_b037f2bf-9b2f-4640-8c55-d0f05e309410" xlink:to="loc_us-gaap_GainLossOnSaleOfPropertyPlantEquipment_f8cb6236-6ecc-4984-beb9-2a7d96077e3f" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProvisionForDoubtfulAccounts_41591c5b-c7bf-496d-b2a8-efb70b0b472b" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ProvisionForDoubtfulAccounts"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_b037f2bf-9b2f-4640-8c55-d0f05e309410" xlink:to="loc_us-gaap_ProvisionForDoubtfulAccounts_41591c5b-c7bf-496d-b2a8-efb70b0b472b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AmortizationOfFinancingCosts_462d443c-f3e6-48e4-b53a-02f9ea863fbf" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AmortizationOfFinancingCosts"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_b037f2bf-9b2f-4640-8c55-d0f05e309410" xlink:to="loc_us-gaap_AmortizationOfFinancingCosts_462d443c-f3e6-48e4-b53a-02f9ea863fbf" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_rubi_NonCashLeaseExpense_b6aac126-519e-491c-b1f2-1671836778ba" xlink:href="rubi-20210331.xsd#rubi_NonCashLeaseExpense"/>
    <link:calculationArc order="7" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_b037f2bf-9b2f-4640-8c55-d0f05e309410" xlink:to="loc_rubi_NonCashLeaseExpense_b6aac126-519e-491c-b1f2-1671836778ba" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredIncomeTaxesAndTaxCredits_e8397581-8e26-4b5e-8f33-52165b04099d" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DeferredIncomeTaxesAndTaxCredits"/>
    <link:calculationArc order="8" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_b037f2bf-9b2f-4640-8c55-d0f05e309410" xlink:to="loc_us-gaap_DeferredIncomeTaxesAndTaxCredits_e8397581-8e26-4b5e-8f33-52165b04099d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignCurrencyTransactionGainLossUnrealized_c66d876c-c1c7-4634-b247-5b2d68e2ab06" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ForeignCurrencyTransactionGainLossUnrealized"/>
    <link:calculationArc order="9" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_b037f2bf-9b2f-4640-8c55-d0f05e309410" xlink:to="loc_us-gaap_ForeignCurrencyTransactionGainLossUnrealized_c66d876c-c1c7-4634-b247-5b2d68e2ab06" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInAccountsReceivable_b5262132-8c0f-43b0-a895-f6913d3adf9f" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncreaseDecreaseInAccountsReceivable"/>
    <link:calculationArc order="10" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_b037f2bf-9b2f-4640-8c55-d0f05e309410" xlink:to="loc_us-gaap_IncreaseDecreaseInAccountsReceivable_b5262132-8c0f-43b0-a895-f6913d3adf9f" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_f569cd0b-b221-4ea8-a24d-f96896b38cb0" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets"/>
    <link:calculationArc order="11" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_b037f2bf-9b2f-4640-8c55-d0f05e309410" xlink:to="loc_us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_f569cd0b-b221-4ea8-a24d-f96896b38cb0" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities_80d7fe81-954b-4ffd-ab15-dbaca012626e" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities"/>
    <link:calculationArc order="12" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_b037f2bf-9b2f-4640-8c55-d0f05e309410" xlink:to="loc_us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities_80d7fe81-954b-4ffd-ab15-dbaca012626e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherOperatingLiabilities_385d5e2d-5ce4-4bc6-be2d-55a1831d3650" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncreaseDecreaseInOtherOperatingLiabilities"/>
    <link:calculationArc order="13" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_b037f2bf-9b2f-4640-8c55-d0f05e309410" xlink:to="loc_us-gaap_IncreaseDecreaseInOtherOperatingLiabilities_385d5e2d-5ce4-4bc6-be2d-55a1831d3650" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_c8c13d05-1df4-41f8-a2e4-3c4750f6aa78" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_cac57fad-eb6b-4446-b26b-0cc79f3a372d" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PaymentsToAcquirePropertyPlantAndEquipment"/>
    <link:calculationArc order="1" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_c8c13d05-1df4-41f8-a2e4-3c4750f6aa78" xlink:to="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_cac57fad-eb6b-4446-b26b-0cc79f3a372d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToDevelopSoftware_64b8294c-8782-4c5d-9166-c747ab561923" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PaymentsToDevelopSoftware"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_c8c13d05-1df4-41f8-a2e4-3c4750f6aa78" xlink:to="loc_us-gaap_PaymentsToDevelopSoftware_64b8294c-8782-4c5d-9166-c747ab561923" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_33545d39-e84e-4bb9-833c-0ba944d26b8a" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromConvertibleDebt_7754df35-9df6-46dc-aba7-1bb992cd29cd" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ProceedsFromConvertibleDebt"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_33545d39-e84e-4bb9-833c-0ba944d26b8a" xlink:to="loc_us-gaap_ProceedsFromConvertibleDebt_7754df35-9df6-46dc-aba7-1bb992cd29cd" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_rubi_PaymentsForCappedCallOptions_3b52ee43-bac0-4d70-89a8-a4707be3e495" xlink:href="rubi-20210331.xsd#rubi_PaymentsForCappedCallOptions"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_33545d39-e84e-4bb9-833c-0ba944d26b8a" xlink:to="loc_rubi_PaymentsForCappedCallOptions_3b52ee43-bac0-4d70-89a8-a4707be3e495" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsOfDebtIssuanceCosts_e8ae1a24-f989-4d89-8857-a118c0f5a11b" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PaymentsOfDebtIssuanceCosts"/>
    <link:calculationArc order="3" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_33545d39-e84e-4bb9-833c-0ba944d26b8a" xlink:to="loc_us-gaap_PaymentsOfDebtIssuanceCosts_e8ae1a24-f989-4d89-8857-a118c0f5a11b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromStockOptionsExercised_d1dff976-ff4e-4585-8ebc-e87e559a8666" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ProceedsFromStockOptionsExercised"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_33545d39-e84e-4bb9-833c-0ba944d26b8a" xlink:to="loc_us-gaap_ProceedsFromStockOptionsExercised_d1dff976-ff4e-4585-8ebc-e87e559a8666" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation_8738044a-60bd-478e-9057-8c909de2e71f" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation"/>
    <link:calculationArc order="5" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_33545d39-e84e-4bb9-833c-0ba944d26b8a" xlink:to="loc_us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation_8738044a-60bd-478e-9057-8c909de2e71f" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.rubiconproject.com/role/OrganizationandSummaryofSignificantAccountingPolicies" xlink:type="simple" xlink:href="rubi-20210331.xsd#OrganizationandSummaryofSignificantAccountingPolicies"/>
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/OrganizationandSummaryofSignificantAccountingPolicies" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.rubiconproject.com/role/OrganizationandSummaryofSignificantAccountingPoliciesPolicies" xlink:type="simple" xlink:href="rubi-20210331.xsd#OrganizationandSummaryofSignificantAccountingPoliciesPolicies"/>
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/OrganizationandSummaryofSignificantAccountingPoliciesPolicies" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.rubiconproject.com/role/OrganizationandSummaryofSignificantAccountingPoliciesDetails" xlink:type="simple" xlink:href="rubi-20210331.xsd#OrganizationandSummaryofSignificantAccountingPoliciesDetails"/>
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/OrganizationandSummaryofSignificantAccountingPoliciesDetails" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.rubiconproject.com/role/NetIncomeLossPerShare" xlink:type="simple" xlink:href="rubi-20210331.xsd#NetIncomeLossPerShare"/>
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/NetIncomeLossPerShare" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.rubiconproject.com/role/NetIncomeLossPerShareTables" xlink:type="simple" xlink:href="rubi-20210331.xsd#NetIncomeLossPerShareTables"/>
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/NetIncomeLossPerShareTables" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.rubiconproject.com/role/NetIncomeLossPerShareBasicandDilutedIncomeLossPerShareDetails" xlink:type="simple" xlink:href="rubi-20210331.xsd#NetIncomeLossPerShareBasicandDilutedIncomeLossPerShareDetails"/>
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/NetIncomeLossPerShareBasicandDilutedIncomeLossPerShareDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_b6218b36-73c5-4eed-86ca-d5c365cbd63a" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_af65d040-2960-4a0b-9d8c-7d99b8426fa4" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingBasic"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_b6218b36-73c5-4eed-86ca-d5c365cbd63a" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_af65d040-2960-4a0b-9d8c-7d99b8426fa4" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements_148d3dff-d695-49f1-ad7b-4044cd2041cc" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_b6218b36-73c5-4eed-86ca-d5c365cbd63a" xlink:to="loc_us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements_148d3dff-d695-49f1-ad7b-4044cd2041cc" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.rubiconproject.com/role/NetIncomeLossPerShareSharesExcludedFromCalculationofDilutedNetLossPerShareDetails" xlink:type="simple" xlink:href="rubi-20210331.xsd#NetIncomeLossPerShareSharesExcludedFromCalculationofDilutedNetLossPerShareDetails"/>
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/NetIncomeLossPerShareSharesExcludedFromCalculationofDilutedNetLossPerShareDetails" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.rubiconproject.com/role/NetIncomeLossPerShareNarrativeDetails" xlink:type="simple" xlink:href="rubi-20210331.xsd#NetIncomeLossPerShareNarrativeDetails"/>
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/NetIncomeLossPerShareNarrativeDetails" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.rubiconproject.com/role/Revenues" xlink:type="simple" xlink:href="rubi-20210331.xsd#Revenues"/>
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/Revenues" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.rubiconproject.com/role/RevenuesTables" xlink:type="simple" xlink:href="rubi-20210331.xsd#RevenuesTables"/>
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/RevenuesTables" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.rubiconproject.com/role/RevenuesNarrativeDetails" xlink:type="simple" xlink:href="rubi-20210331.xsd#RevenuesNarrativeDetails"/>
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/RevenuesNarrativeDetails" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.rubiconproject.com/role/RevenuesRevenueDisaggregatedbySalesDistributionChannelDetails" xlink:type="simple" xlink:href="rubi-20210331.xsd#RevenuesRevenueDisaggregatedbySalesDistributionChannelDetails"/>
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/RevenuesRevenueDisaggregatedbySalesDistributionChannelDetails" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.rubiconproject.com/role/RevenuesRevenueDisaggregatedbyGeographicLocationDetails" xlink:type="simple" xlink:href="rubi-20210331.xsd#RevenuesRevenueDisaggregatedbyGeographicLocationDetails"/>
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/RevenuesRevenueDisaggregatedbyGeographicLocationDetails" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.rubiconproject.com/role/RevenuesScheduleofAllowanceforDoubtfulAccountsDetails" xlink:type="simple" xlink:href="rubi-20210331.xsd#RevenuesScheduleofAllowanceforDoubtfulAccountsDetails"/>
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/RevenuesScheduleofAllowanceforDoubtfulAccountsDetails" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.rubiconproject.com/role/FairValueMeasurements" xlink:type="simple" xlink:href="rubi-20210331.xsd#FairValueMeasurements"/>
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/FairValueMeasurements" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.rubiconproject.com/role/FairValueMeasurementsTables" xlink:type="simple" xlink:href="rubi-20210331.xsd#FairValueMeasurementsTables"/>
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/FairValueMeasurementsTables" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.rubiconproject.com/role/FairValueMeasurementsFinancialInstrumentsDetails" xlink:type="simple" xlink:href="rubi-20210331.xsd#FairValueMeasurementsFinancialInstrumentsDetails"/>
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/FairValueMeasurementsFinancialInstrumentsDetails" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.rubiconproject.com/role/FairValueMeasurementsNarrativeDetails" xlink:type="simple" xlink:href="rubi-20210331.xsd#FairValueMeasurementsNarrativeDetails"/>
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/FairValueMeasurementsNarrativeDetails" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.rubiconproject.com/role/OtherBalanceSheetAmounts" xlink:type="simple" xlink:href="rubi-20210331.xsd#OtherBalanceSheetAmounts"/>
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/OtherBalanceSheetAmounts" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.rubiconproject.com/role/OtherBalanceSheetAmountsTables" xlink:type="simple" xlink:href="rubi-20210331.xsd#OtherBalanceSheetAmountsTables"/>
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/OtherBalanceSheetAmountsTables" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.rubiconproject.com/role/OtherBalanceSheetAmountsAccountsPayableandAccruedExpensesDetails" xlink:type="simple" xlink:href="rubi-20210331.xsd#OtherBalanceSheetAmountsAccountsPayableandAccruedExpensesDetails"/>
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/OtherBalanceSheetAmountsAccountsPayableandAccruedExpensesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent_c5aa483d-50fb-4635-b1e8-8b676fb67200" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent"/>
    <link:loc xlink:type="locator" xlink:label="loc_rubi_AccountsPayableSellerCurrent_20c7940d-d1e4-459b-a24c-e91e268864b0" xlink:href="rubi-20210331.xsd#rubi_AccountsPayableSellerCurrent"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent_c5aa483d-50fb-4635-b1e8-8b676fb67200" xlink:to="loc_rubi_AccountsPayableSellerCurrent_20c7940d-d1e4-459b-a24c-e91e268864b0" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsPayableTradeCurrent_96202ae5-ccb7-47d1-b6b9-6ae96ea10e8e" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AccountsPayableTradeCurrent"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent_c5aa483d-50fb-4635-b1e8-8b676fb67200" xlink:to="loc_us-gaap_AccountsPayableTradeCurrent_96202ae5-ccb7-47d1-b6b9-6ae96ea10e8e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeRelatedLiabilitiesCurrent_f5a20219-c304-4ddb-9263-c26327e89d65" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EmployeeRelatedLiabilitiesCurrent"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent_c5aa483d-50fb-4635-b1e8-8b676fb67200" xlink:to="loc_us-gaap_EmployeeRelatedLiabilitiesCurrent_f5a20219-c304-4ddb-9263-c26327e89d65" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.rubiconproject.com/role/OtherBalanceSheetAmountsNarrativeDetails" xlink:type="simple" xlink:href="rubi-20210331.xsd#OtherBalanceSheetAmountsNarrativeDetails"/>
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/OtherBalanceSheetAmountsNarrativeDetails" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.rubiconproject.com/role/GoodwillIntangibleAssetsandCapitalizedCostsIncurredinCloudComputingArrangements" xlink:type="simple" xlink:href="rubi-20210331.xsd#GoodwillIntangibleAssetsandCapitalizedCostsIncurredinCloudComputingArrangements"/>
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/GoodwillIntangibleAssetsandCapitalizedCostsIncurredinCloudComputingArrangements" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.rubiconproject.com/role/GoodwillIntangibleAssetsandCapitalizedCostsIncurredinCloudComputingArrangementsTables" xlink:type="simple" xlink:href="rubi-20210331.xsd#GoodwillIntangibleAssetsandCapitalizedCostsIncurredinCloudComputingArrangementsTables"/>
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/GoodwillIntangibleAssetsandCapitalizedCostsIncurredinCloudComputingArrangementsTables" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.rubiconproject.com/role/GoodwillIntangibleAssetsandCapitalizedCostsIncurredinCloudComputingArrangementsNarrativeDetails" xlink:type="simple" xlink:href="rubi-20210331.xsd#GoodwillIntangibleAssetsandCapitalizedCostsIncurredinCloudComputingArrangementsNarrativeDetails"/>
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/GoodwillIntangibleAssetsandCapitalizedCostsIncurredinCloudComputingArrangementsNarrativeDetails" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.rubiconproject.com/role/GoodwillIntangibleAssetsandCapitalizedCostsIncurredinCloudComputingArrangementsFiniteLivedIntangibleAssetsDetails" xlink:type="simple" xlink:href="rubi-20210331.xsd#GoodwillIntangibleAssetsandCapitalizedCostsIncurredinCloudComputingArrangementsFiniteLivedIntangibleAssetsDetails"/>
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/GoodwillIntangibleAssetsandCapitalizedCostsIncurredinCloudComputingArrangementsFiniteLivedIntangibleAssetsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNet_b5931542-a4a9-4e83-9504-50d565db38ec" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsNet"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsGross_0147a66a-7c96-4fd8-a539-75fbc555665f" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsGross"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNet_b5931542-a4a9-4e83-9504-50d565db38ec" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsGross_0147a66a-7c96-4fd8-a539-75fbc555665f" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_8feab02c-b945-4bf4-a1fa-5a15291d7914" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNet_b5931542-a4a9-4e83-9504-50d565db38ec" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_8feab02c-b945-4bf4-a1fa-5a15291d7914" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.rubiconproject.com/role/GoodwillIntangibleAssetsandCapitalizedCostsIncurredinCloudComputingArrangementsFiniteLivedIntangibleAssetsFutureAmortizationExpenseDetails" xlink:type="simple" xlink:href="rubi-20210331.xsd#GoodwillIntangibleAssetsandCapitalizedCostsIncurredinCloudComputingArrangementsFiniteLivedIntangibleAssetsFutureAmortizationExpenseDetails"/>
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/GoodwillIntangibleAssetsandCapitalizedCostsIncurredinCloudComputingArrangementsFiniteLivedIntangibleAssetsFutureAmortizationExpenseDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNet_ab466d83-9ddd-4e9d-af73-8ce5190e8f3c" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsNet"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear_cb6f8cd9-0f3e-432a-9aaf-537c3a39a397" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNet_ab466d83-9ddd-4e9d-af73-8ce5190e8f3c" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear_cb6f8cd9-0f3e-432a-9aaf-537c3a39a397" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths_80909ef3-3945-4f52-9cf4-7904e9587bf5" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNet_ab466d83-9ddd-4e9d-af73-8ce5190e8f3c" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths_80909ef3-3945-4f52-9cf4-7904e9587bf5" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_8b227b1e-0256-4966-9993-fdc94c8e2ae7" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNet_ab466d83-9ddd-4e9d-af73-8ce5190e8f3c" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_8b227b1e-0256-4966-9993-fdc94c8e2ae7" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_13dc7758-b209-43e0-8af4-dad70b6b8969" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNet_ab466d83-9ddd-4e9d-af73-8ce5190e8f3c" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_13dc7758-b209-43e0-8af4-dad70b6b8969" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_4f5730a4-2091-4128-b317-497c654fcdd4" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNet_ab466d83-9ddd-4e9d-af73-8ce5190e8f3c" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_4f5730a4-2091-4128-b317-497c654fcdd4" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_rubi_FiniteLivedIntangibleAssetExpectedAmortizationAfterYearFour_ee7cd534-903f-4c1d-b0d2-2523edcba594" xlink:href="rubi-20210331.xsd#rubi_FiniteLivedIntangibleAssetExpectedAmortizationAfterYearFour"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNet_ab466d83-9ddd-4e9d-af73-8ce5190e8f3c" xlink:to="loc_rubi_FiniteLivedIntangibleAssetExpectedAmortizationAfterYearFour_ee7cd534-903f-4c1d-b0d2-2523edcba594" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.rubiconproject.com/role/BusinessCombinations" xlink:type="simple" xlink:href="rubi-20210331.xsd#BusinessCombinations"/>
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/BusinessCombinations" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.rubiconproject.com/role/BusinessCombinationsTables" xlink:type="simple" xlink:href="rubi-20210331.xsd#BusinessCombinationsTables"/>
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/BusinessCombinationsTables" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.rubiconproject.com/role/BusinessCombinationsUnauditedProformaInformationDetails" xlink:type="simple" xlink:href="rubi-20210331.xsd#BusinessCombinationsUnauditedProformaInformationDetails"/>
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/BusinessCombinationsUnauditedProformaInformationDetails" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.rubiconproject.com/role/MergerAcquisitionandRestructuringCosts" xlink:type="simple" xlink:href="rubi-20210331.xsd#MergerAcquisitionandRestructuringCosts"/>
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/MergerAcquisitionandRestructuringCosts" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.rubiconproject.com/role/MergerAcquisitionandRestructuringCostsTables" xlink:type="simple" xlink:href="rubi-20210331.xsd#MergerAcquisitionandRestructuringCostsTables"/>
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/MergerAcquisitionandRestructuringCostsTables" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.rubiconproject.com/role/MergerAcquisitionandRestructuringCostsMergerandRestructuringCostActivityDetails" xlink:type="simple" xlink:href="rubi-20210331.xsd#MergerAcquisitionandRestructuringCostsMergerandRestructuringCostActivityDetails"/>
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/MergerAcquisitionandRestructuringCostsMergerandRestructuringCostActivityDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_rubi_RestructuringChargesAndBusinessCombinationAcquisitionRelatedCosts_774c4616-2e02-40a8-9f4b-e7d91abed442" xlink:href="rubi-20210331.xsd#rubi_RestructuringChargesAndBusinessCombinationAcquisitionRelatedCosts"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationAcquisitionRelatedCosts_9f6f4fda-63fc-402c-af84-d85037ace97e" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_BusinessCombinationAcquisitionRelatedCosts"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_rubi_RestructuringChargesAndBusinessCombinationAcquisitionRelatedCosts_774c4616-2e02-40a8-9f4b-e7d91abed442" xlink:to="loc_us-gaap_BusinessCombinationAcquisitionRelatedCosts_9f6f4fda-63fc-402c-af84-d85037ace97e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringCharges_65dceafd-7bac-455e-b602-db512fc2300f" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RestructuringCharges"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_rubi_RestructuringChargesAndBusinessCombinationAcquisitionRelatedCosts_774c4616-2e02-40a8-9f4b-e7d91abed442" xlink:to="loc_us-gaap_RestructuringCharges_65dceafd-7bac-455e-b602-db512fc2300f" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_rubi_RestructuringReserveAndMergerRelatedCostsSettledWithoutCash_770d8a39-ff4c-4d43-999a-0fd0db761551" xlink:href="rubi-20210331.xsd#rubi_RestructuringReserveAndMergerRelatedCostsSettledWithoutCash"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_rubi_RestructuringChargesAndBusinessCombinationAcquisitionRelatedCosts_774c4616-2e02-40a8-9f4b-e7d91abed442" xlink:to="loc_rubi_RestructuringReserveAndMergerRelatedCostsSettledWithoutCash_770d8a39-ff4c-4d43-999a-0fd0db761551" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.rubiconproject.com/role/MergerAcquisitionandRestructuringCostsNarrativeDetails" xlink:type="simple" xlink:href="rubi-20210331.xsd#MergerAcquisitionandRestructuringCostsNarrativeDetails"/>
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/MergerAcquisitionandRestructuringCostsNarrativeDetails" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.rubiconproject.com/role/MergerAcquisitionandRestructuringCostsAccruedMergerandRestructuringCostActivityDetails" xlink:type="simple" xlink:href="rubi-20210331.xsd#MergerAcquisitionandRestructuringCostsAccruedMergerandRestructuringCostActivityDetails"/>
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/MergerAcquisitionandRestructuringCostsAccruedMergerandRestructuringCostActivityDetails" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.rubiconproject.com/role/StockBasedCompensation" xlink:type="simple" xlink:href="rubi-20210331.xsd#StockBasedCompensation"/>
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/StockBasedCompensation" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.rubiconproject.com/role/StockBasedCompensationTables" xlink:type="simple" xlink:href="rubi-20210331.xsd#StockBasedCompensationTables"/>
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/StockBasedCompensationTables" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.rubiconproject.com/role/StockBasedCompensationNarrativeDetails" xlink:type="simple" xlink:href="rubi-20210331.xsd#StockBasedCompensationNarrativeDetails"/>
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/StockBasedCompensationNarrativeDetails" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.rubiconproject.com/role/StockBasedCompensationStockOptionsOutstandingDetails" xlink:type="simple" xlink:href="rubi-20210331.xsd#StockBasedCompensationStockOptionsOutstandingDetails"/>
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/StockBasedCompensationStockOptionsOutstandingDetails" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.rubiconproject.com/role/StockBasedCompensationStockOptionsNarrativeDetails" xlink:type="simple" xlink:href="rubi-20210331.xsd#StockBasedCompensationStockOptionsNarrativeDetails"/>
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/StockBasedCompensationStockOptionsNarrativeDetails" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.rubiconproject.com/role/StockBasedCompensationValuationAssumptionsDetails" xlink:type="simple" xlink:href="rubi-20210331.xsd#StockBasedCompensationValuationAssumptionsDetails"/>
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/StockBasedCompensationValuationAssumptionsDetails" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.rubiconproject.com/role/StockBasedCompensationRestrictedStockUnitsActivityDetails" xlink:type="simple" xlink:href="rubi-20210331.xsd#StockBasedCompensationRestrictedStockUnitsActivityDetails"/>
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/StockBasedCompensationRestrictedStockUnitsActivityDetails" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.rubiconproject.com/role/StockBasedCompensationRestrictedStockUnitsNarrativeDetails" xlink:type="simple" xlink:href="rubi-20210331.xsd#StockBasedCompensationRestrictedStockUnitsNarrativeDetails"/>
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/StockBasedCompensationRestrictedStockUnitsNarrativeDetails" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.rubiconproject.com/role/StockBasedCompensationPerformanceStockUnitsNarrativeDetails" xlink:type="simple" xlink:href="rubi-20210331.xsd#StockBasedCompensationPerformanceStockUnitsNarrativeDetails"/>
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/StockBasedCompensationPerformanceStockUnitsNarrativeDetails" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.rubiconproject.com/role/StockBasedCompensationEmployeeStockPurchasePlanNarrativeDetails" xlink:type="simple" xlink:href="rubi-20210331.xsd#StockBasedCompensationEmployeeStockPurchasePlanNarrativeDetails"/>
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/StockBasedCompensationEmployeeStockPurchasePlanNarrativeDetails" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.rubiconproject.com/role/StockBasedCompensationStockBasedCompensationExpenseDetails" xlink:type="simple" xlink:href="rubi-20210331.xsd#StockBasedCompensationStockBasedCompensationExpenseDetails"/>
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/StockBasedCompensationStockBasedCompensationExpenseDetails" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.rubiconproject.com/role/IncomeTaxes" xlink:type="simple" xlink:href="rubi-20210331.xsd#IncomeTaxes"/>
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/IncomeTaxes" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.rubiconproject.com/role/IncomeTaxesDetails" xlink:type="simple" xlink:href="rubi-20210331.xsd#IncomeTaxesDetails"/>
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/IncomeTaxesDetails" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.rubiconproject.com/role/LeaseObligations" xlink:type="simple" xlink:href="rubi-20210331.xsd#LeaseObligations"/>
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/LeaseObligations" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.rubiconproject.com/role/LeaseObligationsTables" xlink:type="simple" xlink:href="rubi-20210331.xsd#LeaseObligationsTables"/>
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/LeaseObligationsTables" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.rubiconproject.com/role/LeaseObligationsNarrativeDetails" xlink:type="simple" xlink:href="rubi-20210331.xsd#LeaseObligationsNarrativeDetails"/>
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/LeaseObligationsNarrativeDetails" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.rubiconproject.com/role/LeaseObligationsScheduleofLeaseLiabilityMaturitiesDetails" xlink:type="simple" xlink:href="rubi-20210331.xsd#LeaseObligationsScheduleofLeaseLiabilityMaturitiesDetails"/>
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/LeaseObligationsScheduleofLeaseLiabilityMaturitiesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_430a9223-03bf-49b7-be3f-17518f2af07b" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount_24121813-bc6c-43b1-bf5b-fa34ca7f2724" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_430a9223-03bf-49b7-be3f-17518f2af07b" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount_24121813-bc6c-43b1-bf5b-fa34ca7f2724" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiability_2a9d9f79-eebf-40dd-a6b9-1759987fcecd" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OperatingLeaseLiability"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_430a9223-03bf-49b7-be3f-17518f2af07b" xlink:to="loc_us-gaap_OperatingLeaseLiability_2a9d9f79-eebf-40dd-a6b9-1759987fcecd" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.rubiconproject.com/role/LeaseObligationsScheduleofLeaseLiabilityMaturitiesDetails_1" xlink:type="simple" xlink:href="rubi-20210331.xsd#LeaseObligationsScheduleofLeaseLiabilityMaturitiesDetails_1"/>
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/LeaseObligationsScheduleofLeaseLiabilityMaturitiesDetails_1" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_4ccc3916-813d-4e9a-848c-a2b9e3a25827" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear_8afaeef6-eb2a-473d-a2d4-26895c39d59b" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_4ccc3916-813d-4e9a-848c-a2b9e3a25827" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear_8afaeef6-eb2a-473d-a2d4-26895c39d59b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths_86922ada-ba4c-40f1-8cb6-5ab0689fb993" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_4ccc3916-813d-4e9a-848c-a2b9e3a25827" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths_86922ada-ba4c-40f1-8cb6-5ab0689fb993" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo_4adb4512-33b2-485c-97be-961b5fe2d078" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_4ccc3916-813d-4e9a-848c-a2b9e3a25827" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo_4adb4512-33b2-485c-97be-961b5fe2d078" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree_aeece317-a328-4e41-b9b2-f0164797187a" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_4ccc3916-813d-4e9a-848c-a2b9e3a25827" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree_aeece317-a328-4e41-b9b2-f0164797187a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour_ef55d3dc-d10d-4ca6-8b93-34b58d63d2d5" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_4ccc3916-813d-4e9a-848c-a2b9e3a25827" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour_ef55d3dc-d10d-4ca6-8b93-34b58d63d2d5" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_rubi_LesseeOperatingLeaseLiabilityToBePaidDueAfterYearFour_3b254be3-d7c0-4a5e-a56f-59600bb2f8fa" xlink:href="rubi-20210331.xsd#rubi_LesseeOperatingLeaseLiabilityToBePaidDueAfterYearFour"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_4ccc3916-813d-4e9a-848c-a2b9e3a25827" xlink:to="loc_rubi_LesseeOperatingLeaseLiabilityToBePaidDueAfterYearFour_3b254be3-d7c0-4a5e-a56f-59600bb2f8fa" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.rubiconproject.com/role/CommitmentsandContingencies" xlink:type="simple" xlink:href="rubi-20210331.xsd#CommitmentsandContingencies"/>
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/CommitmentsandContingencies" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.rubiconproject.com/role/CommitmentsandContingenciesDetails" xlink:type="simple" xlink:href="rubi-20210331.xsd#CommitmentsandContingenciesDetails"/>
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/CommitmentsandContingenciesDetails" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.rubiconproject.com/role/SVBLoanAgreement" xlink:type="simple" xlink:href="rubi-20210331.xsd#SVBLoanAgreement"/>
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/SVBLoanAgreement" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.rubiconproject.com/role/SVBLoanAgreementDetails" xlink:type="simple" xlink:href="rubi-20210331.xsd#SVBLoanAgreementDetails"/>
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/SVBLoanAgreementDetails" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.rubiconproject.com/role/ConvertibleSeniorNotesandCappedCallTransactions" xlink:type="simple" xlink:href="rubi-20210331.xsd#ConvertibleSeniorNotesandCappedCallTransactions"/>
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/ConvertibleSeniorNotesandCappedCallTransactions" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.rubiconproject.com/role/ConvertibleSeniorNotesandCappedCallTransactionsTables" xlink:type="simple" xlink:href="rubi-20210331.xsd#ConvertibleSeniorNotesandCappedCallTransactionsTables"/>
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/ConvertibleSeniorNotesandCappedCallTransactionsTables" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.rubiconproject.com/role/ConvertibleSeniorNotesandCappedCallTransactionsNarrativeDetails" xlink:type="simple" xlink:href="rubi-20210331.xsd#ConvertibleSeniorNotesandCappedCallTransactionsNarrativeDetails"/>
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/ConvertibleSeniorNotesandCappedCallTransactionsNarrativeDetails" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.rubiconproject.com/role/ConvertibleSeniorNotesandCappedCallTransactionsSummaryofConvertibleDebtDetails" xlink:type="simple" xlink:href="rubi-20210331.xsd#ConvertibleSeniorNotesandCappedCallTransactionsSummaryofConvertibleDebtDetails"/>
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/ConvertibleSeniorNotesandCappedCallTransactionsSummaryofConvertibleDebtDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtNoncurrent_6e4a98f7-407d-4677-8d96-4bbeb50af231" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LongTermDebtNoncurrent"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentCarryingAmount_e3e38940-0a8d-445a-a2f4-8865ddcd6a04" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DebtInstrumentCarryingAmount"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LongTermDebtNoncurrent_6e4a98f7-407d-4677-8d96-4bbeb50af231" xlink:to="loc_us-gaap_DebtInstrumentCarryingAmount_e3e38940-0a8d-445a-a2f4-8865ddcd6a04" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredFinanceCostsNet_c2b5357d-553b-48d1-a725-e14378f5c09a" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DeferredFinanceCostsNet"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LongTermDebtNoncurrent_6e4a98f7-407d-4677-8d96-4bbeb50af231" xlink:to="loc_us-gaap_DeferredFinanceCostsNet_c2b5357d-553b-48d1-a725-e14378f5c09a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentUnamortizedDiscount_4204ba77-6cc2-45e0-b852-81b7573f9b4c" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DebtInstrumentUnamortizedDiscount"/>
    <link:calculationArc order="3" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LongTermDebtNoncurrent_6e4a98f7-407d-4677-8d96-4bbeb50af231" xlink:to="loc_us-gaap_DebtInstrumentUnamortizedDiscount_4204ba77-6cc2-45e0-b852-81b7573f9b4c" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.rubiconproject.com/role/ConvertibleSeniorNotesandCappedCallTransactionsInterestExpenseDetails" xlink:type="simple" xlink:href="rubi-20210331.xsd#ConvertibleSeniorNotesandCappedCallTransactionsInterestExpenseDetails"/>
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/ConvertibleSeniorNotesandCappedCallTransactionsInterestExpenseDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestExpense_a5b8786d-2767-487f-89eb-9bcb037d0aa9" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_InterestExpense"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AmortizationOfDebtDiscountPremium_55fc8cc0-74f1-45e8-b6e2-3b3b015478a5" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AmortizationOfDebtDiscountPremium"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_InterestExpense_a5b8786d-2767-487f-89eb-9bcb037d0aa9" xlink:to="loc_us-gaap_AmortizationOfDebtDiscountPremium_55fc8cc0-74f1-45e8-b6e2-3b3b015478a5" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AmortizationOfFinancingCosts_d63e5f84-2abe-43e6-8138-ef775093f671" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AmortizationOfFinancingCosts"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_InterestExpense_a5b8786d-2767-487f-89eb-9bcb037d0aa9" xlink:to="loc_us-gaap_AmortizationOfFinancingCosts_d63e5f84-2abe-43e6-8138-ef775093f671" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestExpenseDebt_d6f17113-7260-428b-ba4c-8046b4772ce7" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_InterestExpenseDebt"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_InterestExpense_a5b8786d-2767-487f-89eb-9bcb037d0aa9" xlink:to="loc_us-gaap_InterestExpenseDebt_d6f17113-7260-428b-ba4c-8046b4772ce7" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.rubiconproject.com/role/ConvertibleSeniorNotesandCappedCallTransactionsAmortizationofDebtDiscountandIssuanceCostsDetails" xlink:type="simple" xlink:href="rubi-20210331.xsd#ConvertibleSeniorNotesandCappedCallTransactionsAmortizationofDebtDiscountandIssuanceCostsDetails"/>
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/ConvertibleSeniorNotesandCappedCallTransactionsAmortizationofDebtDiscountandIssuanceCostsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredFinanceCostsNet_652fe6c0-7e3c-449c-8a54-c5a28c39a738" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DeferredFinanceCostsNet"/>
    <link:loc xlink:type="locator" xlink:label="loc_rubi_AmortizationOfDebtIssuanceCostsYearTwo_e4da2fd2-9d77-43da-9ef4-4e7022c690c1" xlink:href="rubi-20210331.xsd#rubi_AmortizationOfDebtIssuanceCostsYearTwo"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredFinanceCostsNet_652fe6c0-7e3c-449c-8a54-c5a28c39a738" xlink:to="loc_rubi_AmortizationOfDebtIssuanceCostsYearTwo_e4da2fd2-9d77-43da-9ef4-4e7022c690c1" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_rubi_AmortizationOfDebtIssuanceCostsYearOne_cb90158c-3a52-472e-855b-8f892551df80" xlink:href="rubi-20210331.xsd#rubi_AmortizationOfDebtIssuanceCostsYearOne"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredFinanceCostsNet_652fe6c0-7e3c-449c-8a54-c5a28c39a738" xlink:to="loc_rubi_AmortizationOfDebtIssuanceCostsYearOne_cb90158c-3a52-472e-855b-8f892551df80" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_rubi_AmortizationOfDebtIssuanceCostsYearThree_225964a8-2d72-4407-9f95-1e9b56e08a9c" xlink:href="rubi-20210331.xsd#rubi_AmortizationOfDebtIssuanceCostsYearThree"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredFinanceCostsNet_652fe6c0-7e3c-449c-8a54-c5a28c39a738" xlink:to="loc_rubi_AmortizationOfDebtIssuanceCostsYearThree_225964a8-2d72-4407-9f95-1e9b56e08a9c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_rubi_AmortizationOfDebtIssuanceCostsYearFive_5efa39eb-4c22-447d-a96f-3cc0410fb492" xlink:href="rubi-20210331.xsd#rubi_AmortizationOfDebtIssuanceCostsYearFive"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredFinanceCostsNet_652fe6c0-7e3c-449c-8a54-c5a28c39a738" xlink:to="loc_rubi_AmortizationOfDebtIssuanceCostsYearFive_5efa39eb-4c22-447d-a96f-3cc0410fb492" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_rubi_AmortizationOfDebtIssuanceCostsYearFour_b682c10e-1b43-4f45-841e-2f99f5d25b12" xlink:href="rubi-20210331.xsd#rubi_AmortizationOfDebtIssuanceCostsYearFour"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredFinanceCostsNet_652fe6c0-7e3c-449c-8a54-c5a28c39a738" xlink:to="loc_rubi_AmortizationOfDebtIssuanceCostsYearFour_b682c10e-1b43-4f45-841e-2f99f5d25b12" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_rubi_AmortizationOfDebtIssuanceCostsRemainderOfFiscalYear_8229788b-8125-4942-81c8-2197a4c888f7" xlink:href="rubi-20210331.xsd#rubi_AmortizationOfDebtIssuanceCostsRemainderOfFiscalYear"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredFinanceCostsNet_652fe6c0-7e3c-449c-8a54-c5a28c39a738" xlink:to="loc_rubi_AmortizationOfDebtIssuanceCostsRemainderOfFiscalYear_8229788b-8125-4942-81c8-2197a4c888f7" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentUnamortizedDiscount_ac9bc7c4-c87e-4440-8572-3934225abcc7" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DebtInstrumentUnamortizedDiscount"/>
    <link:loc xlink:type="locator" xlink:label="loc_rubi_AmortizationOfDebtDiscountPremiumYearTwo_a7aefb77-7f83-4a58-bae1-4c7e2a683fed" xlink:href="rubi-20210331.xsd#rubi_AmortizationOfDebtDiscountPremiumYearTwo"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DebtInstrumentUnamortizedDiscount_ac9bc7c4-c87e-4440-8572-3934225abcc7" xlink:to="loc_rubi_AmortizationOfDebtDiscountPremiumYearTwo_a7aefb77-7f83-4a58-bae1-4c7e2a683fed" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_rubi_AmortizationOfDebtDiscountPremiumRemainderOfFiscalYear_5d3cac95-0b72-44ad-8dea-1158b410c2d7" xlink:href="rubi-20210331.xsd#rubi_AmortizationOfDebtDiscountPremiumRemainderOfFiscalYear"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DebtInstrumentUnamortizedDiscount_ac9bc7c4-c87e-4440-8572-3934225abcc7" xlink:to="loc_rubi_AmortizationOfDebtDiscountPremiumRemainderOfFiscalYear_5d3cac95-0b72-44ad-8dea-1158b410c2d7" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_rubi_AmortizationOfDebtDiscountPremiumYearFour_e3590b69-cd7b-42c9-9a43-673864c654c8" xlink:href="rubi-20210331.xsd#rubi_AmortizationOfDebtDiscountPremiumYearFour"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DebtInstrumentUnamortizedDiscount_ac9bc7c4-c87e-4440-8572-3934225abcc7" xlink:to="loc_rubi_AmortizationOfDebtDiscountPremiumYearFour_e3590b69-cd7b-42c9-9a43-673864c654c8" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_rubi_AmortizationOfDebtDiscountPremiumYearFive_bc139dd1-6670-497e-a720-4cd7af03f0b0" xlink:href="rubi-20210331.xsd#rubi_AmortizationOfDebtDiscountPremiumYearFive"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DebtInstrumentUnamortizedDiscount_ac9bc7c4-c87e-4440-8572-3934225abcc7" xlink:to="loc_rubi_AmortizationOfDebtDiscountPremiumYearFive_bc139dd1-6670-497e-a720-4cd7af03f0b0" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_rubi_AmortizationOfDebtDiscountPremiumYearThree_ed374c7c-572d-4a8a-8845-26986de32bc9" xlink:href="rubi-20210331.xsd#rubi_AmortizationOfDebtDiscountPremiumYearThree"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DebtInstrumentUnamortizedDiscount_ac9bc7c4-c87e-4440-8572-3934225abcc7" xlink:to="loc_rubi_AmortizationOfDebtDiscountPremiumYearThree_ed374c7c-572d-4a8a-8845-26986de32bc9" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_rubi_AmortizationOfDebtDiscountPremiumYearOne_6304de91-f742-4f25-acb5-89dce7f05c5f" xlink:href="rubi-20210331.xsd#rubi_AmortizationOfDebtDiscountPremiumYearOne"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DebtInstrumentUnamortizedDiscount_ac9bc7c4-c87e-4440-8572-3934225abcc7" xlink:to="loc_rubi_AmortizationOfDebtDiscountPremiumYearOne_6304de91-f742-4f25-acb5-89dce7f05c5f" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.rubiconproject.com/role/SubsequentEvents" xlink:type="simple" xlink:href="rubi-20210331.xsd#SubsequentEvents"/>
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/SubsequentEvents" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.rubiconproject.com/role/SubsequentEventsDetails" xlink:type="simple" xlink:href="rubi-20210331.xsd#SubsequentEventsDetails"/>
  <link:calculationLink xlink:role="http://www.rubiconproject.com/role/SubsequentEventsDetails" xlink:type="extended"/>
</link:linkbase>
