Calculating your cost per install is straightforward once you know the Cost Per Install (CPI) formula and what each input means. This guide explains the method in plain language, walks through a manual calculation, and gives worked examples you can follow — then you can do it instantly with the Cost Per Install (CPI) Calculator.
What is Cost Per Install (CPI)?
The Cost Per Install (CPI) calculation tells you your cost per install from a few simple inputs. The figure you are solving for here is the cost per install, expressed in INR.
The Cost Per Install (CPI) formula
The core formula is:
Cost per install = Total ad spend ÷ App installsHere is what each input means:
- Total ad spend — a money amount. Example: ₹50,000.
- App installs — a number. Example: 2,500.
How to calculate it step by step
- Write down the total ad spend (for example, ₹50,000).
- Write down the app installs (for example, 2,500).
- Apply the formula above to get your cost per install.
- Double-check the result with the Cost Per Install (CPI) Calculator.
Worked examples
Example 1
| Input / Output | Value |
|---|---|
| Total ad spend | ₹50,000 |
| App installs | 2,500 |
| Cost per install | ₹20.00 |
With total ad spend of ₹50,000 and app installs of 2,500, the cost per install works out to ₹20.00.
Example 2
With total ad spend of ₹1,00,000 and app installs of 2,500, the cost per install works out to ₹40.00.
| Result | Value |
|---|---|
| Cost per install | ₹40.00 |
Example 3
With total ad spend of ₹25,000 and app installs of 2,500, the cost per install works out to ₹10.00.
| Result | Value |
|---|---|
| Cost per install | ₹10.00 |
Tips for an accurate result
- Keep your units consistent — mixing, say, months with years or grams with kilograms is the most common source of error.
- Round only at the very end. Rounding inputs early can shift the final answer noticeably.
- Re-run the numbers whenever an input changes, rather than estimating from an old result.
Prefer not to do the maths by hand? — the Cost Per Install (CPI) Calculator does it instantly, for free, with the formula and a worked example built in.
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