# Universal internal unit converter for materials in calculix

**URL:** https://calculix.discourse.group/t/universal-internal-unit-converter-for-materials-in-calculix/4116
**Category:** Model setup
**Created:** [September 24, 2026, 9:57am UTC](https://calculix.discourse.group/t/universal-internal-unit-converter-for-materials-in-calculix/4116 "2026-09-24T09:57:24Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![Stefano4000](https://avatars.discourse-cdn.com/v4/letter/s/43a26b/32.png) [@Stefano4000](https://calculix.discourse.group/u/Stefano4000)
#### Post date: [September 24, 2026, 9:57am UTC](https://calculix.discourse.group/t/universal-internal-unit-converter-for-materials-in-calculix/4116/1 "2026-09-24T09:57:24Z")

</div>

Openfoam 14 is with a universal unit converter.  
Basic dimensions are SI, user can write his numbers with unit.  
Openfoam converts internal to SI.  
See [Units in OpenFOAM | CFD Direct](https://cfd.direct/openfoam/free-software/units/)

So calculix is dimension-system unit free.  
Conversions are often with some errors or rounding failures and engineers with old tests and their unit system like comfort.