CPA Calculator
CPA equals advertising spend divided by tracked actions. A campaign costing 600 with 24 qualifying actions has an average CPA of 25.
Formula & method
CPA = spend ÷ tracked conversions.Worked example
| Input | Value |
|---|---|
| Advertising spend | 600 ¤ |
| Tracked conversions | 24 |
| Result | Value |
|---|---|
| Cost per action | 25 ¤ |
Compare scenarios
The first input changes while the other example inputs stay fixed. These are arithmetic scenarios, not forecasts.
| Compare scenarios | Advertising spend ¤ | Cost per action |
|---|---|---|
| −20% | 480 | 20 ¤ |
| Example | 600 | 25 ¤ |
| +20% | 720 | 30 ¤ |
Assumptions & limits
Define the action before comparing campaigns. A purchase, registration and qualified lead have different values. Fractional attributed conversions are allowed, and delayed or reversed conversions can change the final result.
Displayed results are rounded. Calculations use unrounded JavaScript numbers; small floating-point differences are possible.
Use the same currency and reporting period for every monetary input. This tool does not fetch prices, exchange rates or account data.
Works in your browser
The interactive tool runs in a sandbox with network access blocked. ClearByte and the advertising scripts cannot read values inside it. Browser extensions and a compromised device remain outside this protection.
Sources & definitions
Method checked:
Continue with a related task
Conversion Rate Calculator
Conversion rate equals conversions divided by eligible interactions, multiplied by 100. Forty-two conversions from 1,400 interactions gives 3%.
Campaign ROI Calculator
Campaign ROI equals revenue minus total included costs, divided by those costs, multiplied by 100. Include costs beyond media spend to make the comparison meaningful.
Break-Even CPC Calculator
Break-even CPC equals conversion probability multiplied by contribution per conversion. At a 2.5% conversion rate and 40 contribution per conversion, the modeled ceiling is 1 per click.
CPM Calculator
CPM equals advertising spend divided by impressions, multiplied by 1,000. A spend of 1,200 for 400,000 impressions gives a CPM of 3 in the same currency.