Here is a link to Culver Prop's on-liine pitch selection calculator.

http://www.culverprops.com/pitchselection.htm

O.K., it's meant for airplanes, but it's a handy reference tool, and there are other interesting things on thier web site.

Duane

Edit: Here's an on-line calculator that YamahaulerG1 found that will convert degrees pitch to inches pitch.

http://www.indoorduration.com/PropCalc.asp