CPA Calculator (Cost Per Action)

Calculate cost per action / acquisition from your ad spend and conversions, plus CPC and conversion rate. 🔒 Runs in your browser

Cost per action (CPA)–
Cost per click (CPC)–
Conversion rate–
Formulas
  • CPA = Ad spend ÷ Conversions
  • CPC = Ad spend ÷ Clicks
  • Conversion rate = Conversions ÷ Clicks × 100

How to use the CPA 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

CPA tells you what you pay, on average, for each desired action: a purchase, a lead, an app install or a sign-up. Compare it with how much each action is worth to you.

Frequently asked questions

What is a good CPA?

A CPA is good when it is lower than the profit (or value) each conversion brings. For e-commerce, compare it with your break-even CPA = order value × margin.

Is CPA the same as CAC?

Not exactly. CPA counts any action from a campaign; CAC (customer acquisition cost) counts only new customers and usually includes all sales and marketing costs.

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 CPA Calculator free?

Yes. The CPA 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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