CPA Calculator
Cost per acquisition is what you pay, on average, for each conversion: a sale, a lead or a sign-up. Enter any two values to solve for the third.
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Optional, for extra metrics
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How it's calculated
CPA = Ad spend ÷ Conversions
Ad spend = CPA × Conversions
Conversions = Ad spend ÷ CPA
- Your break-even CPA is the profit a conversion earns before ad costs. Above it, every sale loses money.
- For subscriptions, compare CPA with customer lifetime value, not the first order.
- Lower CPA by improving conversion rate (landing page, offer), not only by cutting bids.