Working With Old Building Plans That Are in Feet and Inches?

Are you working on a renovation? Are these plans/documents in feet and inches?

If so, instead of trying to convert each dimension with a calculator, change your working units temporarily to feet and inches while you model the existing building.

When you’re ready to work in mm again just change it back.

To set working units for the current project, go to Options > Project Preferences > Working Units.

If you need to work in chains and links, this you would need the calculator for sorry.