Change File Units

There are many file formats that do not contain unit settings that include STL, OBJ, PLY, 3DS, and older DXF files. The Change File Units command allows you to quickly change a file units.

In the example below, a STL file is imported into a inch configuration where the original designer used metric units. The Change File Units dialog box show the model extents to be 137x63x12 inches, which is not consistent with an actual wrench. By setting the From Units to millimeters, the wrench is scaled to the correct size.

Another feature of the Change File Units command is the ability to swap y and z. Users of SolidWorks for example often design using y as the up direction.