Free calculators
One number at a time, with the math shown.
Each calculator shows every line of its working and the dated rates it uses, with a link to each source. They’re free, with no sign-up, and your numbers stay on the page.
For Etsy sellers
Etsy fees on one sale
Every fee Etsy takes from a sale, line by line, and what's left.
Open the calculatorEtsy Offsite Ads cost
What Offsite Ads cost your shop a month, and the price that covers them.
Open the calculatorEtsy shipping gap
Whether what buyers pay for shipping covers the label and the box.
Open the calculatorEtsy Ads break-even ROAS
The ROAS your Etsy Ads need before they pay for themselves.
Open the calculatorEtsy price for a profit
The item price that leaves the profit you want on each order, after fees.
Open the calculator
For Shopify sellers
For Amazon sellers
See the whole shop at once.
The free check-up runs these sums together and shows where the money leaks, each leak with its fix and what it’s worth. About a minute, no sign-up.
AI agents can run the same calculators through our free MCP server at /api/mcp, with the same numbers.