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Drivix

Free tool · Paid ads

CPA calculator: cost per acquisition.

Work out what each sale or sign-up costs you in ads, and how much profit is left after it.

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  • No sign-up for the resultRun the numbers and see the answer straight away. Email only if you want the full report.
  • The formula shownCalculators show the formula and a worked example, so you can check the maths.
  • What to do nextEach tool reads your result and tells you the next step.
Cost per acquisitionUS$50.00
CPA = ad spend / conversions. Profit per sale after ads = profit per sale before ads - CPA.
What this means

Each sale or sign-up costs US$50.00 in ads.

Add your profit per sale to see whether that is affordable.

Next: ROAS calculator
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Every figure, what it means and what to do next, with a private link you can share with your team.

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The formula

CPA = ad spend / conversions. Profit per sale after ads = profit per sale before ads - CPA.

A worked example

3,000 of ads bring 60 sales: CPA is 50. If each sale makes 80 profit before ads, 30 is left after ads.

How to read your result

  • A CPA above the profit per sale means every sale loses money.
  • Missed conversions in tracking make CPA look worse than it is, so check tracking first.
More free toolsROAS calculatorSee your return on ad spend, the return you need to break even at your margin, and what the ads actually made after their cost.Cost per lead calculatorWhat each enquiry costs you, what each new customer costs once your close rate is included, and whether that leaves a profit.Conversion rate calculatorWork out the share of visitors who enquire or buy, what each visitor is worth, and what one more point would bring in.Break-even ROAS calculatorThe return your ads need before they make money, from your profit margin, and the most you can pay in ads for each sale.

CPA calculator: questions.

Anything else, ask us directly.

What is the difference between CPA and CAC?

CPA is usually the ad cost per conversion in one campaign or channel. Customer acquisition cost (CAC) is all sales and marketing cost divided by new customers, including salaries and tools.

What is a good CPA?

One that leaves profit: lower than the profit you make from a sale or, for repeat customers, from their lifetime value.

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