Find what you pay to win one customer or conversion.
Please do not make financial decisions based on these results.
What is the CPA Calculator — Cost per Acquisition?
Find what you pay to win one customer or conversion. To use the CPA Calculator — Cost per Acquisition, enter campaign cost, acquisitions, profit per customer; it returns cost per acquisition, profit after acquisition cost, break-even cpa, and shows them instantly as you type.
From impressions to profit
Every campaign is a funnel. Impressions become clicks (CTR), clicks become customers (conversion rate) and customers become profit (lifetime value less acquisition cost). The Online Marketing Conversion Calculator follows the whole funnel, and the ROAS Calculator tells you whether the ad spend paid back.
For subscriptions, watch retention first. A small drop in monthly churn lengthens customer lifetime and raises SaaS lifetime value sharply. Compare it with customer acquisition cost to see how fast each customer repays their cost.
- Paid media. CPC, CPM, CTR, CPA and ROAS are linked: change one and the others move.
- Subscription metrics. MRR, ARR, churn, net revenue retention and the quick ratio show growth quality.
- Creator income. AdSense, website ad and YouTube calculators estimate income from traffic and RPM.
How to use the CPA Calculator — Cost per Acquisition
- Enter your numbers. Start with Campaign cost ($), Acquisitions, Profit per customer ($). Use real figures from your own records where you can. Fields marked optional can stay at zero.
- Read the result. The highlighted box gives the Cost per acquisition, and the cards below show Profit after acquisition cost, Break-even CPA. Tables and charts break it down further.
- Test other scenarios. Results update as you type. Change one value at a time to see what drives the answer, and press Reset to go back to the defaults.
Formula and how it works
Example with real numbers
Here is the CPA Calculator — Cost per Acquisition using the default values shown in the calculator above:
Inputs
| Campaign cost ($) | 9,000 |
|---|---|
| Acquisitions | 180 |
| Profit per customer ($) | 90 |
Results
| Cost per acquisition | $50.00 |
|---|---|
| Profit after acquisition cost | $7,200.00 |
| Break-even CPA | $90.00 |
With these inputs the calculator returns Cost per acquisition: $50.00. Change any value in the calculator to see how the result moves.
What if you change one input?
Sensitivity check: raising Campaign cost ($) from 9,000 to 10,800 (about 20% higher) and leaving everything else as in the example above changes the results like this:
| Result | Example | After the change | Change |
|---|---|---|---|
| Cost per acquisition | $50.00 | $60.00 | +20% |
| Profit after acquisition cost | $7,200.00 | $5,400.00 | -25% |
| Break-even CPA | $90.00 | $90.00 | 0% |
The input that moves the result most is the one to check twice. Change it in the calculator above to test your own case.
What the results tell you
The results panel of the CPA Calculator — Cost per Acquisition reports Cost per acquisition, profit after acquisition cost and break-even cpa. Compare these figures while changing one input at a time, and use the related calculators below to look at the same situation from another angle.
Method and limits. This calculator applies the formula in the section above to your inputs, in your browser; nothing you enter is stored on our servers. The result is only as accurate as the numbers you enter and the formula shown above. It is for information, not financial, tax or legal advice.
Frequently asked questions
How does CPA compare with customer value?
CPA should stay well below the profit you earn from the customer over their lifetime.
Do these calculators connect to my analytics?
No. You type in your own figures, and nothing is sent to our servers.
What is a good LTV to CAC ratio?
Three to one is the usual benchmark: each customer should return about three times what it cost to win them.
Are the results guaranteed?
No. Results depend entirely on the numbers you enter and the formulas shown on this page. Please do not make financial decisions based on them alone; confirm important figures with a licensed professional.
Related marketing & saas metrics calculators
- Customer Acquisition Cost Calculator – CAC Calculator
- Bounce Rate Calculator
- Exit Rate Calculator
- Churn Rate Calculator
- CLTV Calculator — Customer Lifetime Value
- SaaS Lifetime Value Calculator
- Online Marketing Conversion Calculator
- CPC and CPM Calculator
- CPM Calculator
- AdSense Earnings Calculator
- Customer Retention Rate Calculator
- Conversion Rate Calculator
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