Inflation / Purchasing Power Calculator
See how inflation changes purchasing power over time. Convert any amount between years using US CPI data. Free online calculator.
US CPI-U annual averages (BLS, 1982-84=100). Approximate figures for planning.
Frequently asked questions
- What data does it use?
- US CPI-U annual averages published by the Bureau of Labor Statistics, covering 1980 through 2024.
- How is the conversion calculated?
- Amount multiplied by the CPI of the target year divided by the CPI of the starting year, which is the standard purchasing-power formula.
- Can I convert in both directions?
- Yes. The result shows both what the earlier amount is worth in the later year, and the reverse.
- How accurate is it?
- CPI figures are rounded to one decimal and the calculator assumes annual averages, so results are close estimates for planning, not exact month-level values.
This tool runs entirely in your browser. No data is uploaded anywhere.