About ResaleMath

ResaleMath is an independent set of free calculators that show online sellers what they actually keep after marketplace fees.

We check every fee against the platform's official help pages and show the date it was last verified. We are not affiliated with Whatnot, Depop, Poshmark, Mercari or any other marketplace.

Contact

Spotted a fee change or a mistake? Email [email protected]. We re-check reported changes within 24 hours.