eBay Calculator

 is a comprehensive eBay and PayPal fees calculator app for Android, which provides the simplest and most convenient way to calculate your eBay and PayPal fees, costs, and profit.

eBay Calculator is available to download from Google Play or the Amazon Appstore

Be sure to check out the Features and Screenshots for a more detailed look at the app.
Or have a look at the Reviews to see what other people have got to say about it.