How it works
Maximum CAC = contribution LTV ÷ desired multiple. Maximum CPI = maximum CAC × paid conversion.
Acquisition and ads
Maximum profitable CPI calculator
Estimate a CPI ceiling from contribution LTV per payer, paid conversion, and the return you want to preserve.
- Scenario maximum CPI
- $5.00
- Scenario maximum CAC
- $100.00
Use LTV after variable costs, not gross revenue. The ceiling depends on estimates and an acceptable recovery window.
Worked example
Contribution LTV of 200, 5% conversion and a 2× multiple give a maximum CPI of 5.
Assumptions and limits
Use LTV after variable costs, not gross revenue. The ceiling depends on estimates and an acceptable recovery window.
Frequently asked questions
How do I use the maximum profitable cpi calculator?
Estimate a CPI ceiling from contribution LTV per payer, paid conversion, and the return you want to preserve.
Can this ceiling become a bid automatically?
There is no campaign integration. Compare mature channel data and a safety margin before changing bids.
Do I need an account and are my inputs uploaded?
No account is required. Calculations run in your browser. Entered numbers and text are not included in tool analytics events; only the tool ID, language, and action are recorded.
Want to go past the numbers and see the real market?
Noctral shows estimated MRR, live ads, creators, and competitors so you can validate opportunities with real signals instead of projections.
See Noctral data
