About Seller Fee Calculators

Seller Fee Calculators is a set of fee calculators for people selling on eBay, PayPal, Etsy, Mercari, Poshmark, Stripe and Cash App. Each one is built from that platform's own published fee schedule, not a generic percentage, so the rate, the rounding, and what the fee is actually charged on (item price, shipping, tax) all match what the platform itself does.

It exists because every one of these platforms computes its cut differently, and the difference is exactly where a seller doing the math by hand gets it wrong: eBay charges its fee on shipping and sales tax as well as the item price; Poshmark switches between a flat fee and a percentage at a $15 threshold; Mercari is a single flat rate with nothing added on top. A calculator that assumes one of these shapes for all of them will quietly misstate what you actually keep.

It's free because the fee tables are public, every rate here is cited and dated against the platform's own page, linked from each calculator and tracked on the fee change log. There's nothing gated behind an account or an email address, and every calculation happens in your browser: nothing you type is sent anywhere or stored.

Builder of Seller Fee Calculators. Software engineer. Not affiliated with, or endorsed by, any marketplace or payment provider.

Contact

Questions, feedback, or spotted a rate that's out of date? Email hello@sellerfeecalculators.com.