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Inflation Calculator (US CPI)

Estimate how much a past amount is worth in another year using annual average CPI. Local-only calculation. Share links store only inputs.

Input

Annual-average CPI → results may differ from monthly CPI calculators.
Disclaimer: This is an estimate based on CPI annual averages. It does not include investment returns, interest, taxes, or personal spending patterns.

How to use

1) Enter an amount

Type the dollar amount you want to convert (e.g., 100).

2) Choose years

Select From and To years. Latest year works as a “today-ish” target.

3) Read the breakdown

Check the adjusted amount, multiplier, cumulative inflation %, and CPI values.

What this calculator does

This tool estimates purchasing power changes between years using US CPI annual average. The calculation is:
Adjusted amount = Amount × (CPI(to) / CPI(from))

Different calculators can show different results because they might use monthly CPI, a different CPI series, or different rounding rules.

Data note: The CPI values embedded in this page are annual averages. If your “latest year” CPI is labeled as an estimate in your data source, treat it as a reasonable reference, not a guarantee.

FAQ