FeeCulator is a free calculator hub that shows exactly what payment processors, marketplaces, and freelance platforms take in fees — and what you actually keep. 58 calculators cover Stripe, PayPal, Square, Wise, Etsy, eBay, Fiverr, Upwork & more across 5 countries. Everything runs instantly in your browser (no signup, nothing sent to server), every calculator links its source, and rates are verified weekly against official pricing pages. Compare providers side-by-side before you price a sale.