Inflation calculator – value of a dollar over time

Q: How do I calculate the average annual inflation rate?

Use the geometric mean: (CPI end ÷ CPI start)1/n − 1. For 2020 to 2025 that is 1.24391/5 − 1 = 4.46% a year – slightly less than simply dividing 24.39% by 5.

What would $100 from 2000 be worth today? Enter an amount, a start year and a target year to get the amount with the same buying power, the cumulative inflation and the average annual rate. The calculator uses official annual averages only: the U.S. CPI-U from the Bureau of Labor Statistics, and the German consumer price index as a second option.

Country / price index

Amount

Start year

Year the amount is from

Target year

Year whose prices the result is expressed in

Result

Same buying power: US$100.00 in 2000 equals US$186.96 in 2025
Cumulative inflation: 86.96%
Average inflation per year: 2.53%
Loss of purchasing power: 46.51%
Index values used: 2000: 172.2 · 2025: 321.943 (base 1982-84=100)
Year-by-year breakdown: Year Index Inflation vs. prior year Amount
2000 172.2 3.4% US$100.00
2001 177.1 2.8% US$102.85
2002 179.9 1.6% US$104.47
2003 184 2.3% US$106.85
2004 188.9 2.7% US$109.70
2005 195.3 3.4% US$113.41
2006 201.6 3.2% US$117.07
2007 207.342 2.8% US$120.41
2008 215.303 3.8% US$125.03
2009 214.537 -0.4% US$124.59
2010 218.056 1.6% US$126.63
2011 224.939 3.2% US$130.63
2012 229.594 2.1% US$133.33
2013 232.957 1.5% US$135.28
2014 236.736 1.6% US$137.48
2015 237.017 0.1% US$137.64
2016 240.007 1.3% US$139.38
2017 245.12 2.1% US$142.35
2018 251.107 2.4% US$145.82
2019 255.657 1.8% US$148.47
2020 258.811 1.2% US$150.30
2021 270.97 4.7% US$157.36
2022 292.655 8.0% US$169.95
2023 304.702 4.1% US$176.95
2024 313.689 2.9% US$182.17
2025 321.943 2.6% US$186.96

Year	Index	Inflation vs. prior year	Amount
2000	172.2	3.4%	US$100.00
2001	177.1	2.8%	US$102.85
2002	179.9	1.6%	US$104.47
2003	184	2.3%	US$106.85
2004	188.9	2.7%	US$109.70
2005	195.3	3.4%	US$113.41
2006	201.6	3.2%	US$117.07
2007	207.342	2.8%	US$120.41
2008	215.303	3.8%	US$125.03
2009	214.537	-0.4%	US$124.59
2010	218.056	1.6%	US$126.63
2011	224.939	3.2%	US$130.63
2012	229.594	2.1%	US$133.33
2013	232.957	1.5%	US$135.28
2014	236.736	1.6%	US$137.48
2015	237.017	0.1%	US$137.64
2016	240.007	1.3%	US$139.38
2017	245.12	2.1%	US$142.35
2018	251.107	2.4%	US$145.82
2019	255.657	1.8%	US$148.47
2020	258.811	1.2%	US$150.30
2021	270.97	4.7%	US$157.36
2022	292.655	8.0%	US$169.95
2023	304.702	4.1%	US$176.95
2024	313.689	2.9%	US$182.17
2025	321.943	2.6%	US$186.96

How it is calculated

How the inflation calculator works

The Consumer Price Index for All Urban Consumers (CPI-U) published by the U.S. Bureau of Labor Statistics tracks the prices urban households pay for goods and services. This calculator uses its official annual averages (series CUUR0000SA0, All items in U.S. city average, 1982-84 = 100) from 1913 on. For Germany it uses the consumer price index of the Federal Statistical Office (Destatis, table 61111-0001, 2020 = 100) from 1991 on. The current year is added once its annual average has been published.

Formulas

Same buying power: amount × CPI(target year) ÷ CPI(start year)
Cumulative inflation: CPI(later year) ÷ CPI(earlier year) − 1
Average annual inflation: (CPI(later year) ÷ CPI(earlier year))^1/n − 1, where n is the number of years in between
Loss of purchasing power: 1 − CPI(earlier year) ÷ CPI(later year)

Example: $100 from 2000

The CPI-U averaged 172.2 in 2000 and 321.943 in 2025. So $100 in 2000 had the same buying power as 100 × 321.943 ÷ 172.2 = $186.96 in 2025. Prices rose by 86.96% over those 25 years, or 2.53% a year on average ((321.943 ÷ 172.2)^1/25 − 1). Put the other way round, a dollar lost 46.51% of its purchasing power. Going back further, $1 from 1913 equals $32.52 in 2025.

Why results can differ from other calculators

The BLS's own CPI Inflation Calculator works with monthly index values, so its result for a given month can differ slightly from a calculation with annual averages. Other calculators may use a different index, such as the chained CPI or the PCE price index. The CPI measures an average basket – your personal inflation depends on what you spend your money on. Interest and wage growth are not included; to project savings, use the compound interest calculator.

Data: U.S. Bureau of Labor Statistics, CPI-U CUUR0000SA0 (public domain); Statistisches Bundesamt (Destatis), GENESIS-Online 61111-0001, licensed under Datenlizenz Deutschland – Namensnennung – Version 2.0. Results are our own calculations based on these data.

Frequently asked questions

How much is $100 from 2000 worth today?

Based on the annual average CPI-U, $100 in 2000 had the same buying power as $186.96 in 2025 (CPI 172.2 → 321.943). That is an average inflation rate of 2.53% a year.

How do you calculate inflation between two years?

Divide the CPI of the later year by the CPI of the earlier year and subtract 1. From 2020 (258.811) to 2025 (321.943) prices rose by 24.39%. Multiply an amount by the same ratio to adjust it for inflation.

How do I calculate the average annual inflation rate?

Use the geometric mean: (CPI end ÷ CPI start)^1/n − 1. For 2020 to 2025 that is 1.2439^1/5 − 1 = 4.46% a year – slightly less than simply dividing 24.39% by 5.

How far back does the calculator go?

For the United States to 1913, the first year of the CPI-U annual averages published by the BLS; for Germany to 1991. The latest year is 2025, the most recent full year with an official annual average.

Why is my result different from the BLS CPI Inflation Calculator?

The BLS calculator compares single months, while this calculator uses annual averages. Both use the same CPI-U series, so the differences are small and come from price changes within the year.

Can I convert German marks or euros?

Yes. Choose Germany: amounts are adjusted with the official German consumer price index, and amounts in Deutsche Mark are first converted at the fixed rate of 1.95583 DM per euro. 100 DM from 1995 equal €87.78 in 2025.

Sources and legal basis

As of: 27 September 2026