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Free tools

Advertising calculators that do not ask for your email.

The arithmetic every media buyer redoes in a spreadsheet each week. Open, type, get the answer, leave.

In short

Six free calculators for paid media: ROAS, break-even ROAS, CPA, average order value, engagement rate and ad profit. Each one runs in your browser, needs no signup, and shows the formula it used so you can check the result rather than trust it.

The tools

ROAS calculatorFree ROAS calculator. Enter ad spend and revenue to get return on ad spend, plus the break-even ROAS your margin actually requires.Break-even ROAS calculatorFree break-even ROAS calculator. Enter your gross margin to find the exact return on ad spend you need before a campaign makes any profit.CPA calculatorFree CPA calculator. Enter spend, clicks and conversions to get cost per acquisition, cost per click and conversion rate in one place.AOV calculatorFree average order value calculator. Enter revenue and orders to get AOV, plus the CPA headroom a higher AOV buys you.Engagement rate calculatorFree engagement rate calculator. Enter engagements plus reach, impressions or followers to get all three engagement rates at once.Ad profit calculatorFree ad profit calculator. Enter spend, revenue and cost of goods to see real profit after ads, profit margin and ROAS in one view.Advertising to sales ratio calculatorFree advertising to sales ratio calculator. Enter ad spend and total revenue to get your A/S ratio, the share of sales going back into advertising.

Why these six

They are the numbers that decide whether a campaign lives. ROAS and break-even ROAS tell you if the maths works at all. CPA and AOV set the ceiling on what you can pay for a customer. Ad profit is the one the dashboards do not show you, because no ad platform knows your cost of goods.

None of them need an account, and none of them send you anything. If you want the same numbers pulled automatically from your live accounts instead of typed in by hand, that is what Muze does.

Or let an AI read the numbers for you

Connect Meta, Google, Amazon and Shopify to ChatGPT or Claude and ask which campaigns are below break-even. Free to start, and every change previews before it runs.

See how Muze works