See what each click and each customer costs — and the most you can pay per click before ads lose money.
Cost per click (CPC)
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Cost per acquisition (CPA)
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Conversion rate
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Break-even CPC
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Profit per conversion × conversion rate
Profit after ad spend
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What is the CPC & CPA Calculator?
Cost per click is only half the story. What matters is whether those clicks turn into customers at a cost you can afford.
This calculator gives your CPC, CPA and conversion rate — and your break-even CPC: the most you can pay per click before ads lose money.
How to use the CPC & CPA Calculator
- Enter your ad spend, clicks and conversions.
- Enter what one conversion is worth and your gross margin.
- Compare your CPC with the break-even CPC.
Understanding your results
- Break-even CPC
- Profit per conversion × conversion rate. Bid below it to stay profitable.
- CPA
- Cost per acquisition — spend ÷ conversions.
Frequently asked questions
What is a good cost per click?
One that is comfortably below your break-even CPC. Industry averages vary from under $1 to over $5.
How can I lower my CPA?
Improve the landing page conversion rate first — it lowers CPA without changing bids.
What is the difference between CPC and CPA?
CPC is the cost of a click; CPA is the cost of a sale or lead.