Signal PPC

CPA Calculator

Calculate your cost per acquisition (CPA) from advertising spend and the number of conversions it generated.

Total amount spent on the campaign(s) you're measuring.
The count of completed actions attributed to that spend — purchases, leads, signups, etc.

Formula

CPA = Advertising Spend ÷ Conversions

CPA tells you how much you paid, on average, for each conversion generated by a given amount of spend. It's a campaign-level efficiency metric, not a full profitability measure — it doesn't account for product cost or other non-advertising expenses.

Worked Example

If you spend $2,400 and generate 80 conversions, CPA = $2,400 ÷ 80 = $30.00 per conversion.

Once you know your CPA, the Maximum CPC Calculator can help translate a target CPA into a bid ceiling, using your conversion rate.

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Maximum CPC Calculator

Find the highest CPC you can bid based on your target CPA and conversion rate.

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Calculate your cost per thousand impressions from ad spend and impressions.