PayPal Fee Calculator

So simple, so useful, why didn't someone come up with this sooner. PayPal Fee Calculator will let you quickly determine what PayPal's cut will be on a transaction. The nice thing is they offer a way to say I want to receive this much, so how much do I have to request to get the amount I want and still cover PayPal's fees.

Link:
http://www.ppcalc.com/