CPA Calculator

Calculate cost per acquisition

CPA, cost per action or acquisition, is what it costs to get one conversion, and it is the bottom-line efficiency of marketing spend. This calculator computes CPA from your spend and conversions, so you know what each customer or action costs to acquire.

Why CPA is the decisive metric

Reach and clicks are means to an end; the end is a conversion, a sale, a signup, an action, and CPA measures exactly what that costs. Dividing spend by conversions gives the cost per acquisition, which you compare against the value of a conversion to know whether the marketing is profitable: if a customer is worth more than the CPA, you profit, and if not, you do not. This makes CPA the metric that decides whether a channel or campaign should scale up, hold, or stop, which is why it sits at the centre of marketing economics.

A planning estimate

This is an estimate for planning from the figures you enter, not financial or business advice. Real outcomes depend on factors beyond any single calculation, so treat the result as a guide. The calculation runs entirely in your browser, so your figures are never uploaded and stay on your own machine, which matters for business numbers you would not want to share.

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