Parm, the relations I created are not much good inside pro|e that I can tell.
The way you would use it is to have annotation on the screen, one in inch value that you would edit, and upon part regeneration, the "calculator" would return the equivalent architectural value.
It is much easier to do this with a calculator and just overwrite the dimension to show exactly what you want.
No matter what, it is a whole lot more work than it should be.
This site does it very quickly:
http://www.decitectural.com/
