Ecommerce Calculators

Every tool runs entirely in your browser. Nothing is uploaded, nothing is tracked, and there is no account to make.

Profit Margin Calculator

Enter cost and price, get margin, markup and profit per unit — or work backwards from a target margin.

Find the exact return on ad spend where your campaigns stop losing money.

Estimate referral and fulfillment fees by size tier.

True per-unit cost including freight, duties and inspection.