PayPal Fee Calculator
PayPal rates differ by country, payment type and currency, and PayPal changes them from time to time, so this calculator does not prefill a rate. Find yours on PayPal's merchant fees page: United States, United Kingdom, or the fees link in the footer of your country's PayPal site.
You enter the rates; the calculator does the arithmetic. Runs in your browser, nothing is sent to a server. Not affiliated with PayPal.