Comment 1 for bug 171282

I'll second this request.

I'm designing a woodworking project, and would very much like to enter sizes in fractions of an inch. (Yes, I know, but they don't have mm size lumber here.)

It would also be nice to enter distances and sizes with units, e.g. "35 mm" even if your default units were inches.
As a quick hack, the expression could be exported to the Unix program "units".