Marketplace fee calculators
Choose the marketplace you want to price first, run the real listing assumptions, and see what is left after seller fees, shipping, and cost of goods.
Use calculators for listings and the index for baseline data
Platform calculators answer one marketplace at a time. Use the Fee Index when you need citable same-input fee rows across marketplaces, Fee Changes when a recent fee update may affect a calculator assumption, and Seller Reports when you need a dated summary of fee pressure.
After the source check, return to the exact platform calculator with the sale price, shipping, item cost, and optional fee settings for your listing.
What these calculator pages cover
Each calculator page is built to answer the practical seller question first: if this item sells for a given price, how much do I actually keep after marketplace fees, shipping, and cost of goods.
They are designed around core seller-fee math rather than every possible edge case. Use the platform page for a direct payout estimate, then check the related guide if the marketplace has optional ad fees, shipping quirks, or category rules that need a manual sanity check.
A simple way to choose the right page
Use a platform calculator when you already know where the item probably belongs. Use a category page when that marketplace has category-specific fee logic that could change the payout. Use a comparison page when the margin is close or when the audience fit might justify a higher-fee marketplace.
If you know the item but not the marketplace, start with the platform picker quiz before choosing a calculator.
The real advantage of the calculator index is speed. It helps you get to the right tool quickly enough that fee checking becomes a habit instead of an extra chore.
Fee guides and comparisons
If you want to understand why the numbers look the way they do, read the fee guide for that marketplace. If the margin is close, use a comparison page to test whether another marketplace leaves more room.