Cost Per Acquisition (CPA) Calculator
Enter your ad spend and number of conversions to instantly calculate your cost per acquisition (CPA). Add a target CPA to see how many conversions the same budget could buy and whether you are hitting your goal.
Input
$
conv.
$
Your target cost per acquisition. Enter it to see how many conversions the current ad spend could buy.
Result
Cost per acquisition (CPA)
$5,000.00
Cost to acquire one conversion
Ad spend
$300,000.00
Conversions
60 conv.
CPA
$5,000.00
| Formula | Ad spend ÷ Conversions |
| Breakdown | $300,000.00 ÷ 60 conv. |
| Cost per acquisition (CPA) | $5,000.00 / conv. |
| Target CPA | $4,000.00 / conv. |
| Conversions affordable at target CPA (same spend) | 75 conv. |
Your current CPA ($5,000.00) exceeds the target CPA ($4,000.00).
How it works
- CPA (cost per acquisition) is calculated as "ad spend ÷ conversions". It represents the cost of generating a single result.
- For example, $1,000 of ad spend producing 50 conversions gives a CPA of 1,000 ÷ 50 = $20.
- A lower CPA means you are acquiring results more cost-efficiently. If your CPA is comfortably below the profit per sale, the campaign is profitable.
- Enter a target CPA to also see how many conversions your current ad spend could buy at that rate (ad spend ÷ target CPA).
- Keep the definition of a conversion (purchase, sign-up, inquiry, etc.) and the measurement period consistent when comparing.
- An acceptable CPA depends on your product's price and margin. It is best to judge it against LTV (lifetime value) to decide whether it falls within an acceptable range.
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Cost Per Acquisition (CPA) Calculator