Online sellers lose money when fees are guessed. These calculators work out fees, payout and profit for PayPal, Stripe, Shopify, Whatnot, Amazon, Walmart, Mercari, Poshmark, Depop and TikTok Shop, plus tools for reseller profit, shipping thresholds and dimensional weight. Every rate is editable and each page shows a last-verified date.

All Marketplace & Seller Fees calculators

How to get good results

Platforms change fees often. Some defaults here come from official pages and some are placeholders that you should check, as each page states. Always confirm the current rate on the platform before you price.

See all calculators

Last updated: November 2026