Break-Even ROAS Calculator

Calculate the minimum ROAS, maximum ACoS and maximum cost per acquisition your ads can have before you lose money. 🔒 Runs in your browser

Break-even ROAS–
Break-even ACoS (max ad cost of sale)–
Break-even CPA (max cost per order)–
Formulas
  • Break-even ROAS = 1 ÷ Profit margin
  • Break-even ACoS = Profit margin
  • Break-even CPA = Average order value × Profit margin

How to use the Break-Even ROAS Calculator

  1. Choose your currency if the calculator uses amounts.
  2. Enter your own numbers in the fields (the examples are only a starting point).
  3. Results update instantly as you type.
  4. Check the formulas below the results, and copy the results to share them.

About this tool

If your ROAS is below the break-even ROAS, every sale from ads costs more than it earns. Use it to set target ROAS bids in Google Ads, Meta Ads or Amazon.

Frequently asked questions

What is a good ROAS?

Any ROAS above your break-even ROAS is profitable. With a 40% margin you break even at 2.5×; many stores target 3–4× to leave room for overheads.

What is ACoS?

Advertising Cost of Sale (used on Amazon) = ad spend ÷ ad revenue. It is the inverse of ROAS: ACoS 25% = ROAS 4×.

Are my numbers saved or sent anywhere?

No. Everything is calculated in your browser; only your currency choice is remembered on this device.

Is the Break-Even ROAS Calculator free?

Yes. The Break-Even ROAS Calculator is completely free to use, with no sign-up and no limits on normal use.

Is my data safe?

Yes. This tool runs entirely in your web browser using JavaScript. Your text is never uploaded to our servers.

Does it work on mobile?

Yes, it works in any modern browser on phones, tablets and computers. No app to install.

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