About SellerCalc

SellerCalc is a free website for people who sell online in the United States.

It covers fee, profit and shipping calculators and guides for Amazon, Etsy, eBay, Walmart, Shopify, Whatnot, Poshmark and Mercari. Each calculator shows the formula it uses, and each guide shows a worked example, so you can check the maths yourself.

SellerCalc is an independent tools site. It is not owned by, or affiliated with, any marketplace named on this site. Marketplace names are used only to describe what each calculator is for.

Results are estimates and general information only. They are not financial, legal or tax advice, and they do not replace the platform's own fee page or your own records. Platform fees change, so check the current fee page before you price an item or make a business decision.

There are no accounts, no sign-up and no download. You can use every calculator free.