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CPI Calculator

Calculate cost per install from campaign spend and attributed installs, then compare acquisition efficiency with ROAS and player-value targets. Results are estimates and run privately in your browser.

Try a worked example

Illustrative inputs, not actual studio results. Selecting an example replaces the values below; edit them to use your own numbers.

$120 spent for 240 attributed installs is $0.50 per install. This says nothing yet about what those players earn.

The same $120 for 80 attributed installs is $1.50 per install. Compare retention and cohort revenue before choosing between the campaigns.

Cost per installEnter your values

Enter your values to see a result.

What this helps you decide

Use CPI to judge whether a campaign is acquiring players at a sustainable price and to compare networks or creative tests on the same cost-per-install basis.

How to use this tool

Choose the campaign, platform, reporting dates and attribution window before copying spend and installs. Use paid attributed installs only; adding organic installs makes the paid campaign look artificially cheap.

How the calculation works

CPI = total campaign spend ÷ attributed installs

Example

A $300 campaign with 240 attributed installs has a CPI of $1.25. A $1,600 campaign with 20 attributed installs has a CPI of $80; with 80 installs, the same spend has a CPI of $20.

Read the result without overestimating it

A $200 test with 100 installs costs $2 per install. Compare that acquisition cost with the same audience’s measured value and retention, not with another country’s average.

Why this result matters

CPI shows the acquisition price of each install, but it should be compared with retention, ad revenue, and purchase revenue. Cheap installs are not automatically profitable players.

Tips for a more useful estimate

  • Use attributed installs from the same date range as spend.
  • Compare CPI by country and campaign.
  • Do not mix organic installs into paid CPI.

Frequently asked questions

What is a good CPI?

It depends on the game, country, platform, and value produced by each player.

Is CPI the same as CPA?

CPI measures installs; CPA can measure another action such as a purchase or registration.

For a worked walkthrough, read Mobile Game CPI Calculator: CPA and ROAS Guide.

FROM THE STUDIO

Try Nicole’s Shadow Run

Outrun danger with precision, power, and style.

Explore Nicole’s Shadow Run

Prepared by Dorn Bros Entertainment · Updated October 27, 2026 · Report a calculation issue

This free tool provides an estimate for general informational purposes. It is not financial, tax, legal, or professional advice.