Compare software

CalculiX vs Elmer FEM: catalog facts
CalculiX	Elmer FEM
Screenshots
Best for: Engineers who need a free structural FEA solver	Best for: Engineers and researchers running finite element simulations without a commercial licence
Free Free software at no cost.	Free Free and open source.
Windows, Linux	Windows, Linux
Linear and non-linear static, dynamic and thermal analysis Reads the Abaqus input format All 4 strengths for CalculiX Linear and non-linear static, dynamic and thermal analysis Reads the Abaqus input format Exports meshes for several other FEA and CFD codes Includes a simple STEP reader	Free and open-source finite element simulation Handles coupled multiphysics problems
Dated interface with a steep learning curve Developed by volunteers in their spare time	Steeper learning curve than commercial FEA tools Release details could not be confirmed from the website at research time
Downloadable app	Downloadable app
Open source	Open source
License not stated	License not stated
No account needed	Not stated if an account is needed
Offline features available	Not stated if it works offline
Official website Full listing and sources Sources for CalculiX calculix.de Catalog checked October 1, 2026	Official website Full listing and sources Sources for Elmer FEM elmerfem.org Catalog checked September 24, 2026

“Not stated” means we have not confirmed it. Features can vary by device and plan.

Screenshots