# Dimensions different from Autocad export

**URL:** <https://discourse.shapr3d.com/t/dimensions-different-from-autocad-export/10472>\
**Category:** Modeling Questions\
**Created:** [December 22, 2020, 4:50am UTC](https://discourse.shapr3d.com/t/dimensions-different-from-autocad-export/10472 "2020-12-22T04:50:36Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Brett-o](https://avatars.discourse-cdn.com/v4/letter/b/9de053/32.png) [@Brett-o](https://discourse.shapr3d.com/u/Brett-o)\
**Post date:** [December 22, 2020, 4:50am UTC](https://discourse.shapr3d.com/t/dimensions-different-from-autocad-export/10472/1 "2020-12-22T04:50:37Z")

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Drawing dimensions change when I save from Autocad (DWG or DXF) and open in Shaper3D.

I have created a drawing in Autocad mechanical 2018 and the dimension of a particular object is 10mm. When I open the file in Shaper3D, that same object is 254mm…?  
I have tried saving and opening the drawing as DXF and DWG, however I get the same results.

Is there a way to save a file from Autocad and then open in Shaper3D so that object dimensions are the same as in the original drawing?

Thanks

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**Author:** ![Laci\_K](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/laci_k/32/8196_2.png) [@Laci\_K](https://discourse.shapr3d.com/u/Laci_K)\
**Post date:** [December 22, 2020, 7:42am UTC](https://discourse.shapr3d.com/t/dimensions-different-from-autocad-export/10472/2 "2020-12-22T07:42:13Z")

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Hi!

For me it seems like a mm to inch change during export. This page will probably help. Let me know if it solved the problem:

> **[Units and Coordinates for DWG/DXF Exports | Revit Products 2018 | Autodesk...](https://knowledge.autodesk.com/support/revit-products/learn-explore/caas/CloudHelp/cloudhelp/2018/ENU/Revit-DocumentPresent/files/GUID-DE0C0484-D7E8-4726-BAB9-9866663DB65F-htm.html#:~:text=One%20DWG%20unit%20is&text=For%20imperial%20projects,%20the%20default,the%20exported%20DWG/DXF%20file)**
>
> Use the Units & Coordinates tab of the Modify DWG/DXF Export Setup dialog to specify DWG units and the basis for the coordinate system. Click File tab ExportOptions (Export Setups DWG/DXF). Select the setup to modify. Click the Units &...