<?xml version="1.0" encoding="us-ascii"?>
<!--XBRL document created with Toppan Merrill Bridge  9.6.8119.21675 -->
<!--Based on XBRL 2.1-->
<!--Created on: 5/6/2022 3:16:02 PM-->
<!--Modified on: 5/6/2022 3:16:02 PM-->
<link:linkbase xmlns="http://www.xbrl.org/2003/linkbase" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xlink="http://www.w3.org/1999/xlink" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xbrli="http://www.xbrl.org/2003/instance">
  <roleRef xlink:type="simple" xlink:href="unl-20220331.xsd#StatementCondensedStatementsOfFinancialCondition" roleURI="http://www.unitedstates12monthnaturalgasfund.com/role/StatementCondensedStatementsOfFinancialCondition" />
  <roleRef xlink:type="simple" xlink:href="unl-20220331.xsd#StatementCondensedStatementsOfOperations" roleURI="http://www.unitedstates12monthnaturalgasfund.com/role/StatementCondensedStatementsOfOperations" />
  <roleRef xlink:type="simple" xlink:href="unl-20220331.xsd#StatementCondensedStatementsOfCashFlows" roleURI="http://www.unitedstates12monthnaturalgasfund.com/role/StatementCondensedStatementsOfCashFlows" />
  <roleRef xlink:type="simple" xlink:href="unl-20220331.xsd#StatementCondensedStatementsOfCashFlowsParenthetical" roleURI="http://www.unitedstates12monthnaturalgasfund.com/role/StatementCondensedStatementsOfCashFlowsParenthetical" />
  <calculationLink xlink:role="http://www.unitedstates12monthnaturalgasfund.com/role/StatementCondensedStatementsOfFinancialCondition" xlink:type="extended" xlink:title="00100 - Statement - Condensed Statements of Financial Condition">
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_Assets" xlink:label="loc_us-gaap_Assets" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:label="us-gaap_CashAndCashEquivalentsAtCarryingValue_637874469610906166" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets" xlink:to="us-gaap_CashAndCashEquivalentsAtCarryingValue_637874469610906166" order="1" use="optional" weight="1" />
    <loc xlink:type="locator" xlink:href="unl-20220331.xsd#unl_CashAndCashEquivalentsInTradingAccounts" xlink:label="unl_CashAndCashEquivalentsInTradingAccounts_637874469610906166" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets" xlink:to="unl_CashAndCashEquivalentsInTradingAccounts_637874469610906166" order="2" use="optional" weight="1" priority="2" />
    <loc xlink:type="locator" xlink:href="unl-20220331.xsd#unl_UnrealizedGainLossOnOpenCommodityFuturesContracts" xlink:label="unl_UnrealizedGainLossOnOpenCommodityFuturesContracts_637874469610906166" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets" xlink:to="unl_UnrealizedGainLossOnOpenCommodityFuturesContracts_637874469610906166" order="3" use="optional" weight="-1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DueFromOfficersOrStockholders" xlink:label="us-gaap_DueFromOfficersOrStockholders_637874469610916048" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets" xlink:to="us-gaap_DueFromOfficersOrStockholders_637874469610916048" order="4" use="optional" weight="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DividendsReceivable" xlink:label="us-gaap_DividendsReceivable_637874469610916048" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets" xlink:to="us-gaap_DividendsReceivable_637874469610916048" order="5" use="optional" weight="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_InterestReceivable" xlink:label="us-gaap_InterestReceivable_637874469610916048" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets" xlink:to="us-gaap_InterestReceivable_637874469610916048" order="6" use="optional" weight="1" />
    <loc xlink:type="locator" xlink:href="unl-20220331.xsd#unl_PrepaidLicenseFees" xlink:label="unl_PrepaidLicenseFees_637874469610916048" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets" xlink:to="unl_PrepaidLicenseFees_637874469610916048" order="7" use="optional" weight="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PrepaidInsurance" xlink:label="us-gaap_PrepaidInsurance_637874469610916048" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets" xlink:to="us-gaap_PrepaidInsurance_637874469610916048" order="8" use="optional" weight="1" priority="2" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquity" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquity" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_Liabilities" xlink:label="us-gaap_Liabilities_637874469610926041" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity" xlink:to="us-gaap_Liabilities_637874469610926041" order="1" use="optional" weight="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DueToCorrespondentBrokers" xlink:label="us-gaap_DueToCorrespondentBrokers_637874469610926041" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_Liabilities_637874469610926041" xlink:to="us-gaap_DueToCorrespondentBrokers_637874469610926041" order="1" use="optional" weight="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DueToOfficersOrStockholdersCurrentAndNoncurrent" xlink:label="us-gaap_DueToOfficersOrStockholdersCurrentAndNoncurrent_637874469610926041" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_Liabilities_637874469610926041" xlink:to="us-gaap_DueToOfficersOrStockholdersCurrentAndNoncurrent_637874469610926041" order="2" use="optional" weight="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AccruedProfessionalFeesCurrentAndNoncurrent" xlink:label="us-gaap_AccruedProfessionalFeesCurrentAndNoncurrent_637874469610926041" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_Liabilities_637874469610926041" xlink:to="us-gaap_AccruedProfessionalFeesCurrentAndNoncurrent_637874469610926041" order="3" use="optional" weight="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CommissionsPayableToBrokerDealersAndClearingOrganizations" xlink:label="us-gaap_CommissionsPayableToBrokerDealersAndClearingOrganizations_637874469610926041" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_Liabilities_637874469610926041" xlink:to="us-gaap_CommissionsPayableToBrokerDealersAndClearingOrganizations_637874469610926041" order="4" use="optional" weight="1" />
    <loc xlink:type="locator" xlink:href="unl-20220331.xsd#unl_DirectorsFeesPayableCurrentAndNoncurrent" xlink:label="unl_DirectorsFeesPayableCurrentAndNoncurrent_637874469610926041" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_Liabilities_637874469610926041" xlink:to="unl_DirectorsFeesPayableCurrentAndNoncurrent_637874469610926041" order="5" use="optional" weight="1" priority="2" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PartnersCapital" xlink:label="us-gaap_PartnersCapital_637874469610926041" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity" xlink:to="us-gaap_PartnersCapital_637874469610926041" order="2" use="optional" weight="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_GeneralPartnersCapitalAccount" xlink:label="us-gaap_GeneralPartnersCapitalAccount_637874469610936413" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_PartnersCapital_637874469610926041" xlink:to="us-gaap_GeneralPartnersCapitalAccount_637874469610936413" order="1" use="optional" weight="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LimitedPartnersCapitalAccount" xlink:label="us-gaap_LimitedPartnersCapitalAccount_637874469610936413" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_PartnersCapital_637874469610926041" xlink:to="us-gaap_LimitedPartnersCapitalAccount_637874469610936413" order="2" use="optional" weight="1" />
  </calculationLink>
  <calculationLink xlink:role="http://www.unitedstates12monthnaturalgasfund.com/role/StatementCondensedStatementsOfOperations" xlink:type="extended" xlink:title="00300 - Statement - Condensed Statements of Operations">
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="loc_us-gaap_NetIncomeLoss" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_Revenues" xlink:label="us-gaap_Revenues_637874469610936413" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLoss" xlink:to="us-gaap_Revenues_637874469610936413" order="1" use="optional" weight="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_GainLossOnSaleOfInvestments" xlink:label="us-gaap_GainLossOnSaleOfInvestments_637874469610936413" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_Revenues_637874469610936413" xlink:to="us-gaap_GainLossOnSaleOfInvestments_637874469610936413" order="1" use="optional" weight="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_GainLossOnSaleOfDerivatives" xlink:label="us-gaap_GainLossOnSaleOfDerivatives_637874469610936413" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_Revenues_637874469610936413" xlink:to="us-gaap_GainLossOnSaleOfDerivatives_637874469610936413" order="2" use="optional" weight="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_UnrealizedGainLossOnDerivatives" xlink:label="us-gaap_UnrealizedGainLossOnDerivatives_637874469610936413" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_Revenues_637874469610936413" xlink:to="us-gaap_UnrealizedGainLossOnDerivatives_637874469610936413" order="3" use="optional" weight="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DividendIncomeOperating" xlink:label="us-gaap_DividendIncomeOperating_637874469610936413" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_Revenues_637874469610936413" xlink:to="us-gaap_DividendIncomeOperating_637874469610936413" order="4" use="optional" weight="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_InterestIncomeOperating" xlink:label="us-gaap_InterestIncomeOperating_637874469610946332" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_Revenues_637874469610936413" xlink:to="us-gaap_InterestIncomeOperating_637874469610946332" order="5" use="optional" weight="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RevenueFromContractWithCustomerIncludingAssessedTax" xlink:label="us-gaap_RevenueFromContractWithCustomerIncludingAssessedTax_637874469610946332" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_Revenues_637874469610936413" xlink:to="us-gaap_RevenueFromContractWithCustomerIncludingAssessedTax_637874469610946332" order="6" use="optional" weight="1" />
    <loc xlink:type="locator" xlink:href="unl-20220331.xsd#unl_NetOperatingExpenses" xlink:label="unl_NetOperatingExpenses_637874469610946332" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLoss" xlink:to="unl_NetOperatingExpenses_637874469610946332" order="2" use="optional" weight="-1" />
    <loc xlink:type="locator" xlink:href="unl-20220331.xsd#unl_ExpenseWaiver" xlink:label="unl_ExpenseWaiver_637874469610946332" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="unl_NetOperatingExpenses_637874469610946332" xlink:to="unl_ExpenseWaiver_637874469610946332" order="1" use="optional" weight="-1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OperatingExpenses" xlink:label="us-gaap_OperatingExpenses_637874469610946332" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="unl_NetOperatingExpenses_637874469610946332" xlink:to="us-gaap_OperatingExpenses_637874469610946332" order="2" use="optional" weight="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ManagementFeeExpense" xlink:label="us-gaap_ManagementFeeExpense_637874469610946332" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_OperatingExpenses_637874469610946332" xlink:to="us-gaap_ManagementFeeExpense_637874469610946332" order="1" use="optional" weight="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ProfessionalFees" xlink:label="us-gaap_ProfessionalFees_637874469610946332" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_OperatingExpenses_637874469610946332" xlink:to="us-gaap_ProfessionalFees_637874469610946332" order="2" use="optional" weight="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FloorBrokerageExchangeAndClearanceFees" xlink:label="us-gaap_FloorBrokerageExchangeAndClearanceFees_637874469610956508" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_OperatingExpenses_637874469610946332" xlink:to="us-gaap_FloorBrokerageExchangeAndClearanceFees_637874469610956508" order="3" use="optional" weight="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NoninterestExpenseDirectorsFees" xlink:label="us-gaap_NoninterestExpenseDirectorsFees_637874469610956508" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_OperatingExpenses_637874469610946332" xlink:to="us-gaap_NoninterestExpenseDirectorsFees_637874469610956508" order="4" use="optional" weight="1" />
    <loc xlink:type="locator" xlink:href="unl-20220331.xsd#unl_LicenseFeesAndOtherOfferingExpenses" xlink:label="unl_LicenseFeesAndOtherOfferingExpenses_637874469610956508" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_OperatingExpenses_637874469610946332" xlink:to="unl_LicenseFeesAndOtherOfferingExpenses_637874469610956508" order="5" use="optional" weight="1" />
  </calculationLink>
  <calculationLink xlink:role="http://www.unitedstates12monthnaturalgasfund.com/role/StatementCondensedStatementsOfCashFlows" xlink:type="extended" xlink:title="00500 - Statement - Condensed Statements of Cash Flows">
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivities_637874469610956508" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect" xlink:to="us-gaap_NetCashProvidedByUsedInFinancingActivities_637874469610956508" order="1" use="optional" weight="1" priority="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ProceedsFromPartnershipContribution" xlink:label="us-gaap_ProceedsFromPartnershipContribution_637874469610956508" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInFinancingActivities_637874469610956508" xlink:to="us-gaap_ProceedsFromPartnershipContribution_637874469610956508" order="1" use="optional" weight="1" />
    <loc xlink:type="locator" xlink:href="unl-20220331.xsd#unl_PaymentsToPartnershipRedemption" xlink:label="unl_PaymentsToPartnershipRedemption_637874469610956508" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInFinancingActivities_637874469610956508" xlink:to="unl_PaymentsToPartnershipRedemption_637874469610956508" order="2" use="optional" weight="-1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivities_637874469610966332" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect" xlink:to="us-gaap_NetCashProvidedByUsedInOperatingActivities_637874469610966332" order="2" use="optional" weight="1" priority="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ProfitLoss" xlink:label="us-gaap_ProfitLoss_637874469610966332" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivities_637874469610966332" xlink:to="us-gaap_ProfitLoss_637874469610966332" order="1" use="optional" weight="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_UnrealizedGainLossOnDerivativesAndCommodityContracts" xlink:label="us-gaap_UnrealizedGainLossOnDerivativesAndCommodityContracts_637874469610966332" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivities_637874469610966332" xlink:to="us-gaap_UnrealizedGainLossOnDerivativesAndCommodityContracts_637874469610966332" order="2" use="optional" weight="-1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncreaseDecreaseDueFromOfficersAndStockholders" xlink:label="us-gaap_IncreaseDecreaseDueFromOfficersAndStockholders_637874469610966332" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivities_637874469610966332" xlink:to="us-gaap_IncreaseDecreaseDueFromOfficersAndStockholders_637874469610966332" order="3" use="optional" weight="-1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncreaseDecreaseInDividendsReceivable" xlink:label="us-gaap_IncreaseDecreaseInDividendsReceivable_637874469610966332" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivities_637874469610966332" xlink:to="us-gaap_IncreaseDecreaseInDividendsReceivable_637874469610966332" order="4" use="optional" weight="-1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncreaseDecreaseInAccruedInterestReceivableNet" xlink:label="us-gaap_IncreaseDecreaseInAccruedInterestReceivableNet_637874469610966332" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivities_637874469610966332" xlink:to="us-gaap_IncreaseDecreaseInAccruedInterestReceivableNet_637874469610966332" order="5" use="optional" weight="-1" />
    <loc xlink:type="locator" xlink:href="unl-20220331.xsd#unl_IncreaseDecreaseInPrepaidLicenseFees" xlink:label="unl_IncreaseDecreaseInPrepaidLicenseFees_637874469610966332" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivities_637874469610966332" xlink:to="unl_IncreaseDecreaseInPrepaidLicenseFees_637874469610966332" order="6" use="optional" weight="-1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncreaseDecreaseInPrepaidInsurance" xlink:label="us-gaap_IncreaseDecreaseInPrepaidInsurance_637874469610966332" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivities_637874469610966332" xlink:to="us-gaap_IncreaseDecreaseInPrepaidInsurance_637874469610966332" order="7" use="optional" weight="-1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncreaseDecreaseInPayablesToBrokerDealers" xlink:label="us-gaap_IncreaseDecreaseInPayablesToBrokerDealers_637874469610976661" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivities_637874469610966332" xlink:to="us-gaap_IncreaseDecreaseInPayablesToBrokerDealers_637874469610976661" order="8" use="optional" weight="1" />
    <loc xlink:type="locator" xlink:href="unl-20220331.xsd#unl_IncreaseDecreaseManagementFeesPayable" xlink:label="unl_IncreaseDecreaseManagementFeesPayable_637874469610976661" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivities_637874469610966332" xlink:to="unl_IncreaseDecreaseManagementFeesPayable_637874469610976661" order="9" use="optional" weight="1" />
    <loc xlink:type="locator" xlink:href="unl-20220331.xsd#unl_IncreaseDecreaseInProfessionalFeesPayable" xlink:label="unl_IncreaseDecreaseInProfessionalFeesPayable_637874469610976661" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivities_637874469610966332" xlink:to="unl_IncreaseDecreaseInProfessionalFeesPayable_637874469610976661" order="10" use="optional" weight="1" />
    <loc xlink:type="locator" xlink:href="unl-20220331.xsd#unl_IncreaseDecreaseInDirectorsFeesAndInsurancePayable" xlink:label="unl_IncreaseDecreaseInDirectorsFeesAndInsurancePayable_637874469610976661" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivities_637874469610966332" xlink:to="unl_IncreaseDecreaseInDirectorsFeesAndInsurancePayable_637874469610976661" order="11" use="optional" weight="1" />
  </calculationLink>
  <calculationLink xlink:role="http://www.unitedstates12monthnaturalgasfund.com/role/StatementCondensedStatementsOfCashFlowsParenthetical" xlink:type="extended" xlink:title="00505 - Statement - Condensed Statements of Cash Flows  (Parenthetical)">
    <loc xlink:type="locator" xlink:href="unl-20220331.xsd#unl_CashAndCashEquivalentInEquityInTradingAccounts" xlink:label="unl_CashAndCashEquivalentInEquityInTradingAccounts" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:label="us-gaap_CashAndCashEquivalentsAtCarryingValue_637874469610976661" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="unl_CashAndCashEquivalentInEquityInTradingAccounts" xlink:to="us-gaap_CashAndCashEquivalentsAtCarryingValue_637874469610976661" order="1" use="optional" weight="1" />
    <loc xlink:type="locator" xlink:href="unl-20220331.xsd#unl_CashAndCashEquivalentsInTradingAccounts" xlink:label="unl_CashAndCashEquivalentsInTradingAccounts_637874469610976661" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="unl_CashAndCashEquivalentInEquityInTradingAccounts" xlink:to="unl_CashAndCashEquivalentsInTradingAccounts_637874469610976661" order="2" use="optional" weight="1" priority="2" />
  </calculationLink>
</link:linkbase>
