Is the inflation calculator free?

Yes. It is free, needs no account, and calculates in your browser from a built-in BLS data table; nothing you enter is uploaded or stored.

What data does it use?

Official U.S. Bureau of Labor Statistics CPI-U annual averages (series CUUR0000SA0, 1982–84 = 100) for every year from 1913 through 2025, retrieved from the BLS public time-series files on 2026-06-10.

Can it convert dollars backwards, from today to a past year?

Yes. The conversion is a ratio of the two years' index values, so it works in either direction — set the "from" year to 2025 and the "to" year to the past year.

Why does it stop at 2025?

The calculator uses complete annual averages rather than monthly readings, and 2025 is the most recent year BLS has published. The next annual average arrives each January.

Inflation Calculators

Inflation Calculator

Enter a dollar amount and two years between 1913 and 2025, and the calculator converts it using official BLS CPI-U annual averages — $100 in 2000 carries the buying power of $186.96 in 2025.

Inflation & buying power

View

Amount ($)From year (1913–2025)To year (1913–2025)

$100.00 in 2000 equals

$186.96 in 2025

86.96% cumulative price change · 2.53% average per year (BLS CPI-U annual averages)

Historical conversions use published U.S. Bureau of Labor Statistics CPI-U annual averages (1913–2025); future projections compound the rate you assume. Both are buying-power estimates, not forecasts or financial advice.

About this calculator

A free inflation calculator built on the U.S. Bureau of Labor Statistics CPI-U annual-average index (1913–2025). It converts any amount between two historical years, reports the cumulative price change and the average annual inflation rate over that span, and includes a projection view for future costs at an assumed rate plus a salary view that checks whether a raise beat inflation. Historical conversions are exact ratios of published index values; future projections compound whatever rate you assume. Both are buying-power estimates, not forecasts or financial advice.

What the CPI conversion actually says

The Consumer Price Index tracks what a fixed basket of urban consumer goods and services costs over time. Dividing one year's index by another's gives the conversion factor between their dollars: the 2025 annual average (321.943) divided by the 2000 average (172.2) is about 1.87, which is why $100 from 2000 corresponds to $186.96 in 2025 — an 86.96% cumulative price change, averaging 2.53% per year.

Stretch the span and the compounding becomes dramatic: $1 in 1913, the first year of the index, corresponds to $32.52 in 2025. The same machinery works backwards too — convert a 2025 amount into 1990 dollars by swapping the years, since the math is a pure ratio.

Where the numbers come from

The table behind this calculator is the BLS CPI-U series (All Urban Consumers, U.S. city average, all items, 1982–84 = 100), using the official annual-average row for each year from 1913 through 2025, retrieved from the BLS public data files on 2026-06-10. Annual averages smooth out month-to-month noise, which makes them the standard choice for year-to-year comparisons.

Because the most recent complete annual average is 2025, conversions stop there; BLS publishes each new annual average the following January. CPI is also a national urban average — your personal inflation rate differs with your spending mix, which is a known limitation of any CPI-based conversion.

By variant

Questions

Is the inflation calculator free?: Yes. It is free, needs no account, and calculates in your browser from a built-in BLS data table; nothing you enter is uploaded or stored.
What data does it use?: Official U.S. Bureau of Labor Statistics CPI-U annual averages (series CUUR0000SA0, 1982–84 = 100) for every year from 1913 through 2025, retrieved from the BLS public time-series files on 2026-06-10.
How much is $100 from 2000 worth today?: Using CPI-U annual averages, $100 in 2000 corresponds to $186.96 in 2025 — an 86.96% cumulative price increase, or about 2.53% per year on average.
Can it convert dollars backwards, from today to a past year?: Yes. The conversion is a ratio of the two years' index values, so it works in either direction — set the "from" year to 2025 and the "to" year to the past year.
Why does it stop at 2025?: The calculator uses complete annual averages rather than monthly readings, and 2025 is the most recent year BLS has published. The next annual average arrives each January.