...of course MY caliper measures in the non-real number set...

The conversion is kind of a pain in the a$$ but no one will steal it. Hell, no one wants to BORROW it.
I set my width, ride height, etc in multiples of pi so it all works out. I get strange looks from people when I tell 'em my car is 54.7 wide or 1.43 ride height, but chances are they were looking strangely at me already when I was humming the theme to Numb3rs while I was truing my tires to 14.3 so screw 'em.