Inflation Rate Calculator

Find the inflation rate from two CPI values.

Inflation rate (%) 4

Formula: rate = (new − old) ÷ old × 100

Step-by-step with your numbers:

1. Values used:

2. Earlier CPI = 250

3. Later CPI = 260

5. Inflation rate = 4%

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Measure inflation between two Consumer Price Index readings.

The math behind it

inflation rate = (new CPI − old CPI) ÷ old CPI × 100.

CPI 250 → 260 → 4%.

Deflation?

A negative result means prices fell.