Free calculators built for small business owners, marketplace sellers, startups and freelancers. Every tool on this page runs on published 2026 fee schedules and standard formulas, shows its working step by step, and gives you an estimate you can check — no sign-up, no email required.
Marketplace Fee Calculator
Work out what eBay, Etsy or Amazon really keeps from a sale — every fee line, your net proceeds and the real fee percentage. Open the Marketplace Fee Calculator.
Burn Rate and Runway Calculator
Enter your cash, revenue and expenses to get your gross burn, net burn, months of runway and the date your cash runs out. Open the Burn Rate and Runway Calculator.
Freelance Rate Calculator
Turn the income you want to take home into the hourly and day rate you actually need to charge, with tax and benefits covered. Open the Freelance Rate Calculator.
Credit Card Processing Fee Calculator
Compare flat rate, Square, Stripe and interchange-plus at your real monthly volume and average ticket, and see your effective rate. Open the Credit Card Processing Fee Calculator.
LLC Formation Cost Calculator
See what forming an LLC really costs in your state — the filing fee, the mandatory extras behind it, and the annual costs that follow. Open the LLC Formation Cost Calculator.
A note on these estimates
All five calculators above are live now. They are estimates built from published fee schedules and the numbers you enter; they are not financial advice, and rates change, so confirm current figures in your own seller, processor or state account before you price or file.