Marketing & Email calculator
CPC / CPM / CPA Calculator
Turn a campaign's totals into the standard cost metrics advertisers compare. Everything runs in your browser — nothing you enter is sent anywhere.
Your numbers
Change any value — results update as you type
Values are estimates. Nothing you enter leaves this page.
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Spend per conversion.
Cost per click (CPC)
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Cost per 1,000 impressions (CPM)
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Click-through rate
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Click-to-conversion rate
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Read this estimate carefully
Compare these across channels using the same conversion definition.
How to use it
- Enter total spend, impressions, clicks and conversions.
- Read CPC, CPM, CPA and the two rates.
How it is calculated
- CPC = spend ÷ clicks
- CPM = spend ÷ impressions × 1,000
- CPA = spend ÷ conversions
- CTR = clicks ÷ impressions
Common questions
Which metric should I optimize?
CPA tied to business value is usually the most useful; CPC and CPM explain why it moves.
What is a conversion?
Whatever action you count as success, such as a lead or purchase.
Why is my CPA high with a low CPC?
Low click-to-conversion rate: the traffic is cheap but not relevant.