What We Do
SellerFeeCalc provides free, accurate fee calculators for the marketplaces online sellers actually use: Etsy, eBay, Poshmark, and Mercari. Every calculator applies the current published fee schedule for each platform and shows a line-by-line breakdown, so you can price products with confidence and know your true profit before you list.
Why Trust Our Numbers
Each rate used on this site is verified against the marketplace's own published fee policy and reviewed when platforms announce changes. We show our math in every result — the same breakdown you would compute by hand from the official fee schedules — and our comparison chart documents the source structure for every platform. That said, marketplaces occasionally change fees with little notice and category exceptions exist, so always confirm significant decisions against your own payment account.
Free to Use, Supported by Ads
All tools on this site are free with no sign-up. The site is supported by advertising, which never affects the calculations. If you spot a rate that has changed or a result that looks wrong, please contact us — corrections are our highest priority.