I have the rhinestone calculators on-line now!  So, for those of you needing this capability, but you do not own Excel, here’s a link to them (or you can find them under the Support tab and then under Special Rhinestone Support Section):

Rhinestone Calculators

Also, if you need the actual formulas because you want to program them into your calculator or whatever, then here is the full documentation on the formulas, including how I developed them:

Rhinestone Respacing Documentation