alignment #s

One question I have is that his specs list toe in degrees -- most specs (Allpar, for example) list it in inches. It seems to me that in order to translate one from the other, you need to know the diameter of the tire, and do a calculation (or more simply, draw it to scale and measure the angle). So I can't tell anything about his toe from those numbers. I do understand why modern shops use degrees, but it doesn't easily translate.