FlipMath

Fee & profit calculators for resellers

See exactly what eBay, Etsy, Depop, Whatnot, Poshmark, Mercari and Grailed take from a sale, and what you actually keep after shipping and what you paid for the item. Free, no sign-up.

All fees checked against official pages · latest check October 21, 2026

Where should I sell this?Compare your payout on every marketplace at once eBay fee calculatorFinal value fee by category, store, ads, international Etsy fee calculatorListing, 6.5% transaction, 3% + $0.25 processing, Offsite Ads Depop fee calculatorNo selling fee in the US, 3.3% + $0.45 processing, 12% boost Whatnot fee calculatorNew tiered commission (Sept 2026) + 2.9% + $0.30 Poshmark fee calculator$2.95 under $15, 20% at $15+Mercari fee calculator10% selling fee, no processing fee Grailed fee calculator9% (6% under $120) + processing

Why another fee calculator?

Most fee calculators show a single number and never say where it comes from. Every FlipMath calculator itemizes each fee, links to the marketplace's own fee page, and shows the date we last checked it. It also counts the costs that decide whether a flip was worth it: what you paid, the label, and packaging.

Read how we check fees.

Know your real profit on every sale

A calculator answers one sale at a time. The FlipMath profit tracker (in development) will import your sales from every marketplace and show true profit after fees, shipping and what you paid, plus a year-end summary for taxes. Join the beta: early members lock in a founding price.