How the marketplace calculators work
Each calculator applies that platform’s published seller fees to your sale price and then subtracts your item cost and shipping to show what you keep. The charges differ more than the headline rates suggest. Etsy combines a listing fee, a transaction fee that is charged on the item price plus the shipping you charge, and a payment-processing fee. Mercari charges a 10% selling fee, and Grailed a 9% commission plus payment processing. StockX uses a seller-level fee that falls from about 9% to about 7% as your sales and reliability grow, plus a flat 3% processing fee. Some platforms now charge sellers little or nothing, such as Vinted’s $0 seller fee, so the page shows what processing and shipping still cost.
What to check before you price an item
A fee percentage is only part of the picture. Shipping charges, returns, promoted listings and the cost of the item all change your profit. Enter the numbers you really expect, compare two platforms with the same item and use the quizzes on the finders page if you are not sure where to sell.
Keeping the numbers current
Platforms change fees, run promotions and treat sellers differently by level and region. The calculators use the most recently published schedules for 2025 and 2026 and say so on each page. Confirm the rate in your seller dashboard before you rely on a result, and see how we calculate for the method behind every tool.