Tools for practical seller decisions

Ecom Profit Tools is a free tool website for Shopify, Etsy, Amazon FBA, independent store sellers, marketers, and small business owners. It is designed to make common business calculations quick to run and easy to understand.

Our calculators help estimate profit, marketplace fees, profit margin, markup, return on investment, advertising return, and break-even sales. Calculations happen directly in your browser and do not require a login.

Results provide general educational estimates only. Actual fees, shipping charges, tax treatment, advertising attribution, and business costs vary. Always verify important inputs and decisions using current records and appropriate professional guidance.