Built by sellers, for sellers. We got tired of losing money to hidden fees we didn't see coming.
It started with a frustrated eBay seller who thought she was making $15 profit per sale — until she actually ran the numbers and realized she was making $1.45 after fees.
Platform fees are deliberately confusing. They're split across multiple fee types, buried in help docs, and change without much announcement. CalcFees exists to fix that.
Every calculator is built from the official pricing pages of each platform, cross-referenced against official help centers, platform announcements, and community reports from active sellers.
Each calculator displays the month its rates were last checked. Our methodology page explains exactly how the calculations work and what they leave out, and every correction is listed in the changelog. If you notice a discrepancy, contact us and we'll investigate within 24 hours.