CPA Calculator

Calculate cost-per-acquisition (CPA) for a marketing or ad campaign.

CAMPAIGN NUMBERS

Enter your spend and conversions above to see the CPA.

What this tool does

A CPA (cost per acquisition) calculator divides your total ad spend by the number of conversions it produced, giving you a single dollar figure for what each customer, lead, or sale actually cost to acquire.

How it works

  1. Enter your total ad spend for the period.
  2. Enter the number of conversions (sales, leads, sign-ups) that spend produced.
  3. The CPA updates instantly as you type.
Example: $500 in ad spend that produced 20 conversions works out to a CPA of $25.00 per conversion.
Yes. The cpa calculator is completely free, with no signup, no watermark, and no limit on how many times you use it.
It uses the standard published formula for this calculation, so results match what you'd get doing the math by hand — instantly and without the risk of a manual error.
Yes — it's fully responsive and works the same on mobile, tablet, or desktop, with no app to download.
No. Your inputs are used only to calculate your result in the browser and aren't stored or sent anywhere.
Yes — "cpa calculator" and "cost per acquisition calculator" describe the same task. This page is built to handle that search directly, without redirecting you elsewhere.