ConverterHub

Cost Per Acquisition Calculator

Enter your marketing spend and customers acquired to find your CPA.

How to use

  1. Enter your values in the fields above.
  2. Press Calculate to see your result instantly.
  3. Use the Share button to copy a link to your result.

About this calculator

Cost per acquisition (CPA) measures how much a business spends, on average, to win one paying customer or conversion — calculated simply as total marketing spend ÷ number of customers acquired. It's one of the most-watched metrics in performance marketing because it directly ties ad spend to revenue-generating outcomes rather than vanity metrics like clicks or impressions.

This calculator divides your spend by the customers you acquired over the same period to give a clean CPA figure. Marketers and growth teams use it to compare channels (search ads versus social versus affiliate), decide which campaigns to scale, and check that CPA stays comfortably below customer lifetime value so the business remains profitable.

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