FeynCalc 10.2.1 (June 2026)

A detailed changelog can be found here.

To install FeynCalc 10 and patched FeynArts it is recommended to use the script for automatic installation. See here.

FeynCalc 10.2.0 (December 2025)

A detailed changelog can be found here.

To install FeynCalc 10 and patched FeynArts it is recommended to use the script for automatic installation. See here.

FeynCalc 10.1.0 (August 2024)

A detailed changelog can be found here.

To install FeynCalc 10 and patched FeynArts it is recommended to use the script for automatic installation. See here.

FeynCalc 10.0.0 (December 2023)

A detailed changelog can be found here.

To install FeynCalc 10 and patched FeynArts it is recommended to use the script for automatic installation. See here.

FeynCalc 9.3.1 (June 2020)

A detailed changelog can be found here.

To install FeynCalc 9 and patched FeynArts it is recommended to use the script for automatic installation. See here.

FeynCalc 9.3.0 (January 2020)

A detailed changelog can be found here.

To install FeynCalc 9 and patched FeynArts it is recommended to use the script for automatic installation. See here.

FeynCalc 9.2.0 (November 2016)

• New handy functions FCAbbreviate, FCHideEpsilon, FCShowEpsilon, FCLoopIBPReducableQ, FCFactorOut, SelectFree2, SelectNotFree2
• Finally we have shortcuts for spinors with D-dimensional momenta: SpinorUD, SpinorUBarD, SpinorVD, SpinorVBarD
• New option $KeepLogDivergentScalelessIntegrals permits consistent 1-loop computations, where UV and IR divergences are regularized with different epsilons.
• Examples/FeynRules now contains several FeynRules models (with more to come) with additional scripts that show how such models can be used with patched FeynArts. This should be useful for new users.
• DiracTrace has received a lot of internfal refactoring and should be now faster and much more stable. Thanks to Peng Sun for motivating me to do so. I hope to get DiracSimplify refactored as well in the next release.

A more detailed changelog can be found here.

To install FeynCalc 9 and patched FeynArts it is recommended to use the script for automatic installation. See here.

FeynCalc 9.1.0 (August 2016)

• Many new handy functions: FCTraceExpand, FCTraceFactor, FCGetDimensions, FCCanonicalizeDummyIndices, TarcerToFC, FCReplaceD, FCColorIsolate, FCDiracIsolate, DeclareFCTensor, UnDeclareFCTensor, CommutatorOrder
• Improved support for using FeynCalc with custom FeynRules-models (see http://www.feyncalc.org/forum/1042.html for more details)
• $LimitTo4 is now disabled by default. Even when set to True, it is applied only to 1- and 2-point functions (see http://www.feyncalc.org/forum/1077.html for more details).

A more detailed changelog can be found here.

To install FeynCalc 9 and patched FeynArts it is recommended to use the script for automatic installation. See here.

FeynCalc 9.0.1 (2016)

• For publishing reasons, the license has been changed from LGPL 3 to GPL 3
• Fixed bugs that were discovered since the relese of FeynCalc 9.0.0
• Converted an example of using Integrate2 from FeynCalcManual.nb to a proper .m file

To install FeynCalc 9 and patched FeynArts it is recommended to use the script for automatic installation. See here.

FeynCalc 9.0.0 (2016)

• Improved tensor reduction and partial fractioning of loop integrals.
• New functions for using FeynCalc together with tools for reduction of scalar
  loop integrals using integration-by-parts (IBP) identities.
• Better interface to FeynArts.
• Support for SU (N ) generators with explicit fundamental indices.
• Improved documentation (using Mathematica's Documentation Center).
• Lots of small improvements.
• Numerous bugfixes.

A more detailed changelog can be found here.

To install FeynCalc 9 and patched FeynArts it is recommended to use the script for automatic installation. See here.