ClarityHow to use this tool
- Enter advertising spend, attributed conversions.
- Select Calculate to view the result.
- Check the method and assumptions below before using the result.
Input reference and sample values
Use the units and choices shown for each field. Sample values are provided for practice, not as recommendations.
| Input | Format and units | Sample |
|---|---|---|
| Advertising spend | Numeric value. Unit: money. Zero or positive. | 1200 |
| Attributed conversions | Numeric value. Must be greater than zero. | 40 |
Result for these sample inputs
30 currency units
- Total spend
- 1200
- Attributed conversions
- 40
Select Try the example in the form to load these values and calculate them again. This replaces the current form inputs. Compare the result with the method and worked explanation below.
The method, explained
Average CPA = advertising spend ÷ attributed conversions. Define the conversion action before comparing campaigns. Fractional attributed conversions are supported.
A spend of 1,200 with 40 attributed conversions gives an average CPA of 30. If those conversions are leads, this is cost per lead rather than cost per new customer.
What to keep in mind
The figure depends on conversion definitions, attribution windows and reporting rules. It does not automatically include sales salaries or other acquisition costs.
Reference: Google Ads: average CPA
Common questions
Can conversions be fractional?
Yes. Some attribution models divide conversion credit across interactions. Enter the reported attributed total rather than rounding it to whole actions.
Is actual CPA the same as target CPA?
No. A target is a campaign setting; this calculation reports average cost from the spend and conversions you enter.
Methodology maintained by ClarityKit. How these tools are built and checked.