If you mean fees, then here is a good link to help you out https://www.paypal.com/cgi-bin/webscr?cmd=_display-fees-outside
It depends from country to country and amount you are dealing in. Check your paypal site and it will show you exact amount of fee that they charge in your country and amount specified. Regards
But it also depends on the type of account : free, premier or business. And there are some charges on currency conversion too when you withdraw. They give a detailed list here
calculate paypal fees here.give input amount and you will get the approximate amount after fees deduction.. http://www.rolbe.com/paypal.htm