Inflation Calculator
Calculate how inflation erodes purchasing power over time. Enter an amount and two years to see the equivalent value in today's dollars — uses historical US CPI data.
Equivalent buying power
$240.01
Total inflation
140.0%
How to use the inflation calculator
Enter an amount and two years (US only). The equivalent buying power and total inflation are computed using BLS CPI-U data through 2024.
Formula & explanation
Equivalent = amount × (CPI_target ÷ CPI_source). Total inflation = (CPI_target ÷ CPI_source − 1) × 100.
Examples
100 USD in 1990 had the same buying power as ~240 USD in 2024 — a ~140% cumulative price increase. (US CPI-U.)
Frequently asked questions
- Which inflation measure?
- CPI-U (Consumer Price Index for All Urban Consumers), the most commonly cited US measure.
- Other countries?
- Not yet — US-only for now.
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