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CPA Calculator

Calculate the average cost per acquisition or conversion from advertising spend and the number of conversions generated.

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Updates as valid inputs change.
Method & formula

CPA divides ad spend by the conversions or acquisitions attributed to that spend. The figure only makes sense if the conversion definition and reporting period are consistent.

  • CPA = ad spend ÷ conversions
Example

1,000 of ad spend generating 50 conversions gives a CPA of 20.

FAQ

Can CPA mean cost per action instead of acquisition?

Yes. Advertising platforms use the acronym in different ways. The arithmetic is the same, but you need to be clear about what counts as the conversion.

What happens with zero conversions?

CPA cannot be calculated because the spend would be divided by zero conversions.

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