# Change stl unit default

**URL:** <https://discourse.shapr3d.com/t/change-stl-unit-default/40350>\
**Category:** Modeling Questions\
**Created:** [February 20, 2026, 6:45pm UTC](https://discourse.shapr3d.com/t/change-stl-unit-default/40350 "2026-02-20T18:45:35Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![triforcehunter04](https://avatars.discourse-cdn.com/v4/letter/t/b4bc9f/32.png) [@triforcehunter04](https://discourse.shapr3d.com/u/triforcehunter04)\
**Post date:** [February 20, 2026, 6:45pm UTC](https://discourse.shapr3d.com/t/change-stl-unit-default/40350/1 "2026-02-20T18:45:35Z")

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Is there any way to change the default unit or have it remember the last unit when exporting to STL? Currently I’m designing in inches, but everyone seems to want it in millimeters and I have to remember to change it each time.

Thanks!

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**Author:** ![TheBum](https://avatars.discourse-cdn.com/v4/letter/t/eada6e/32.png) [@TheBum](https://discourse.shapr3d.com/u/TheBum)\
**Post date:** [February 21, 2026, 5:23pm UTC](https://discourse.shapr3d.com/t/change-stl-unit-default/40350/2 "2026-02-21T17:23:50Z")

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STL files do not include units, just magnitudes.

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**Author:** ![triforcehunter04](https://avatars.discourse-cdn.com/v4/letter/t/b4bc9f/32.png) [@triforcehunter04](https://discourse.shapr3d.com/u/triforcehunter04)\
**Post date:** [February 21, 2026, 9:50pm UTC](https://discourse.shapr3d.com/t/change-stl-unit-default/40350/3 "2026-02-21T21:50:35Z")

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Right and the export screen specifies what to use. Is there any way to set a default so it doesn’t have to be set every time?