About
Simple worksheets for checking advertising returns against your own costs.
What the calculators do
The ROAS Calculator divides attributed revenue by ad spend and displays the return as a ratio and percentage. Its optional gross margin model estimates break-even and profit after product costs and advertising.
The Break-Even ROAS Calculator starts with per-order product costs, shipping, payment fees, and other variable costs. It computes contribution, break-even ROAS and CPA, and target ROAS for a desired profit margin.
Who these worksheets are for
They are for e-commerce sellers, media buyers, and anyone checking the arithmetic behind an advertising report or planning a margin-based target. Enter your own numbers; example inputs are not benchmarks or performance recommendations.
Transparent formulas and limits
Formulas are shown with your inputs so you can verify the arithmetic. Calculations retain precision; displayed results are rounded. The currency selector changes labels only, not exchange rates.
The worksheets do not verify attribution or import account data. Omitted costs, fixed overhead, taxes, and changes in product mix or returns can make actual profitability different from the estimates. These are not complete business profit statements.
No account or calculation backend
The calculators run in your browser without an account. Shared links include editable figures in their URL hash, which anyone holding the link can read. See Privacy for how inputs and page requests are handled.