This calculator was created by a professional eBay seller with more than 10 years of experience buying and selling on eBay. This is the only application of its kind that features a clean, efficient interface and is constantly updated with the latest eBay rates and fees (last updated March 2026). The app currently supports eBay US and eBay UK, with both English and Spanish versions available. Best of all, it is completely FREE to use! We value your feedback—please leave your comments and suggestions below. Disclaimer: Seller Fee Calculator was created and is maintained by an independent developer and is not affiliated with eBay or PayPal.