CPA formula
CPA measures the average amount paid for each acquisition. Always use spend and results from the same reporting period.
CPA = Ad spend ÷ Acquisitions
How to use the calculator
- Choose the value you want to calculate.
- Enter spend and campaign data from your advertising platform.
- Select Calculate, then compare like-for-like campaigns and reporting periods.
How to improve CPA
Test creative, audience and placement independently, then improve landing-page relevance and speed. Never judge this metric alone; connect it to traffic quality, conversions and revenue.
Frequently asked questions
How do I calculate CPA?
Enter total ad spend and acquisitions. The calculator applies the formula automatically.
Is a lower number always better?
Not always. A lower cost can still produce poor commercial results when traffic or conversions are low quality.
Does this calculator store my data?
No. Every calculation runs locally in your browser.
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