Free Fee & Profit Calculators for Online Sellers

Check platform fees, profit margins and pricing in seconds. No sign-up needed. Built for US sellers on Etsy, eBay, Poshmark, Depop, Whatnot, Mercari, TikTok Shop, Amazon, Shopify, Gumroad, Stripe and PayPal. Fee rates were checked in October 2026.

• Stripe Fee Calculator
• Stripe Reverse Fee Calculator
• PayPal Fee Calculator
• PayPal Reverse Fee Calculator
• Etsy Fee Calculator
• Etsy Reverse Fee Calculator
• eBay Fee Calculator
• eBay Reverse Fee Calculator
• Poshmark Fee Calculator
• Poshmark Reverse Fee Calculator
• Whatnot Fee Calculator
• Whatnot Reverse Fee Calculator
• TikTok Shop Fee Calculator
• TikTok Shop Reverse Fee Calculator
• Mercari Fee Calculator
• Mercari Reverse Fee Calculator
• Depop Fee Calculator
• Depop Reverse Fee Calculator
• Shopify Payments Fee Calculator
• Shopify Payments Reverse Fee Calculator
• Gumroad Fee Calculator
• Gumroad Reverse Fee Calculator
• Amazon Referral Fee Calculator
• Amazon Referral Reverse Fee Calculator
• Poshmark vs Depop Fees
• Etsy vs eBay Fees
• Profit Margin Calculator
• Markup Calculator
• Break-Even Calculator
• Freelance Hourly Rate Calculator

Why use NetPayoutCalc?

Every calculator runs in your browser, so your numbers stay private. Each page explains the formula, shows a worked example and answers common questions, so you understand the result and not only the number.