Know what you keep before you sell.
Estimate marketplace fees, payout, profit, margin, ROI, and the price you need to hit your target.
Unofficial calculator. Not affiliated with, endorsed by, or sponsored by any marketplace. Results are estimates, not tax or accounting advice.
Seller tools
Choose a calculator
Pick the tool that matches how you sell.
Etsy Fee Calculator
Prepare an Etsy fee and payout estimate with a transparent cost breakdown.
Open toolAmazon FBA Profit Calculator
Model Amazon FBA revenue, fulfillment costs, profit, margin, and ROI.
Open tooleBay Fee Calculator
Estimate eBay payout and profit across supported selling categories.
Open toolTikTok Shop Fee Calculator
Understand how verified TikTok Shop fee rules affect a sale.
Open toolWhatnot Fee Calculator
Plan a Whatnot sale with itemized marketplace and seller costs.
Open toolDepop Fee Calculator
Estimate a Depop payout without assuming unverified listing conditions.
Open toolGeneric Marketplace Calculator
Use your own percentage, fixed fee, and fee basis for another marketplace.
Open toolMarketplace Profit Comparison
Compare the same selling scenario across supported marketplaces.
Open toolReverse Selling Price
Work backward from a target profit to the selling price you need.
Open toolBuilt for decisions, not guesswork
Official sources
Defaults link to publicly accessible marketplace documentation and show when each source was verified.
Transparent breakdowns
Each estimate is designed to show the assumptions, fee basis, and individual deductions.
Private by design
Calculations run in your browser. The initial release needs no account or database.
Every number should be explainable.
Our methodology separates official defaults from seller-specific costs so estimates never hide uncertain assumptions.