CPA Calculator for Ecommerce
Calculate your Cost Per Acquisition and find out if it's below the maximum you can afford without losing money — based on your margin and order value.
Enter your data and click "Calculate CPA" to see results
How CPA is calculated
CPA (Cost Per Acquisition) measures how much you pay for each customer acquired through your ads.
CPA formula
CPA = Ad Spend ÷ Number of sales
Maximum allowable CPA
Max CPA = Average order value × Gross margin
The maximum CPA is the point at which you break even. Any CPA above this means each sale loses money. Your target CPA should be comfortably below this to leave room for returns, overhead, and profit.
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Want to reduce your CPA?
Read our guide on how to reduce CPA without simply cutting your budget — three levers with the most impact.
Read the guide →