CPI Inflation Calculator
Compare an earlier and later consumer price index value to find the inflation rate, the percentage rise in prices between the two readings.
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- No sign-up
Enter two CPI values to see the inflation rate.
Worked example
With these example inputs:
- Earlier CPI280
- Later CPI294
Inflation rate: 5.0%
- Change14
Frequently asked questions
How is inflation measured with the CPI?
Inflation is the percentage change in the consumer price index between two dates. If the CPI rises from 280 to 294, prices have risen 5%.
What is the consumer price index?
The CPI tracks the average price of a basket of goods and services households buy. Comparing it over time shows how fast the cost of living is changing.