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Finance Calculators

Inflation Rate Calculator

Verified formula Updated Jun 2026 Private — runs on your device

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Verified formula Private

Inflation rate

6.0000%

For general information only — not financial, tax, legal or medical advice. Verify before you rely on it.

How to use the Inflation Rate Calculator

The Inflation Rate Calculator works out your inflation rate in an instant. Enter earlier price or index and later price or index and the result updates as you type — it is free, needs no sign-up, and runs entirely in your browser so your figures stay private.

  1. Enter the earlier price or index.
  2. Enter the later price or index.
  3. Read off your inflation rate — the calculator updates automatically, with no button to press.

Formula

The Inflation Rate Calculator uses the formula:

Inflation rate = (Later price or index - Earlier price or index) ÷ Earlier price or index × 100

Worked example

For example, with earlier price or index of 100 and later price or index of 106, the inflation rate is 6.0000%.

Inputs used
Earlier price or index 100
Later price or index 106
Results
Inflation rate 6.0000%

Results are estimates for educational use, not professional advice.

Key terms explained

Inflation
The rate at which prices rise over time, eroding the purchasing power of money.

Frequently asked questions

Take the later value minus the earlier value, divide by the earlier value, and multiply by 100. From 100 to 106 is 6% inflation.

A consumer price index (CPI) is common, but you can use any two prices for the same item at different times.

Yes. A negative result means prices fell, which is deflation rather than inflation.

This is the change over one period. Cumulative inflation compounds several periods of inflation together.

Enter the earlier price or index. Enter the later price or index. Read off your inflation rate — the calculator updates automatically, with no button to press.

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