Inflation Calculator
Calculate how inflation has changed the value of money using real U.S. CPI data from 1913 to 2025. See what past dollars are worth today and how purchasing power has changed over time.
$
$100.00 in 2000 equals
$186.64
in 2025 dollars
Total Inflation
+86.6%
Avg Annual
+2.5%
Year Span
25 yrs
Purchasing Power of $100.00 (2000) Over Time
$100.00 in 2000 had the same buying power as $186.64 in 2025. That means prices increased 86.6% over 25 years, averaging 2.5% per year. To maintain the same purchasing power, you would have needed $86.64 more in 2025.
Inflation by Decade
| Period | Avg Rate |
|---|---|
| 2000-2009 | 2.5% avg/yr |
| 2010-2019 | 1.8% avg/yr |
| 2020-2025 | 4.4% avg/yr |
Year-by-Year CPI Data
| Year | CPI | Annual Rate | $100.00 Equivalent |
|---|---|---|---|
| 2000 | 172.2 | - | $100.00 |
| 2001 | 177.1 | +2.8% | $102.85 |
| 2002 | 179.9 | +1.6% | $104.47 |
| 2003 | 184.0 | +2.3% | $106.85 |
| 2004 | 188.9 | +2.7% | $109.70 |
| 2005 | 195.3 | +3.4% | $113.41 |
| 2006 | 201.6 | +3.2% | $117.07 |
| 2007 | 207.3 | +2.8% | $120.38 |
| 2008 | 215.3 | +3.9% | $125.03 |
| 2009 | 214.5 | -0.4% | $124.56 |
| 2010 | 218.1 | +1.7% | $126.66 |
| 2011 | 224.9 | +3.1% | $130.60 |
| 2012 | 229.6 | +2.1% | $133.33 |
| 2013 | 233.0 | +1.5% | $135.31 |
| 2014 | 236.7 | +1.6% | $137.46 |
| 2015 | 237.0 | +0.1% | $137.63 |
| 2016 | 240.0 | +1.3% | $139.37 |
| 2017 | 245.1 | +2.1% | $142.33 |
| 2018 | 251.1 | +2.4% | $145.82 |
| 2019 | 255.7 | +1.8% | $148.49 |
| 2020 | 258.8 | +1.2% | $150.29 |
| 2021 | 271.0 | +4.7% | $157.38 |
| 2022 | 292.7 | +8.0% | $169.98 |
| 2023 | 304.7 | +4.1% | $176.95 |
| 2024 | 313.5 | +2.9% | $182.06 |
| 2025 | 321.4 | +2.5% | $186.64 |
Frequently Asked Questions
Where does the CPI data come from?+
This calculator uses the Consumer Price Index for All Urban Consumers (CPI-U) annual averages published by the U.S. Bureau of Labor Statistics. CPI data goes back to 1913 and is updated annually. The base period is 1982-84 = 100.
What is the average U.S. inflation rate?+
From 1913 to 2025, the average annual U.S. inflation rate has been approximately 3.2%. However, this varies dramatically by decade: the 1970s averaged over 7% while the 2010s averaged under 2%. Recent years saw a spike with 2022 hitting 8% before cooling to around 2.5% in 2025.
How does inflation affect purchasing power?+
Inflation reduces what each dollar can buy. If inflation is 3% per year, $100 today will only buy what $97 buys next year. Over 25 years at 3%, $100 loses over half its purchasing power — you'd need about $209 to buy what $100 bought 25 years earlier.
Why did inflation spike in 2021-2022?+
The 2021-2022 inflation spike was driven by pandemic-era stimulus spending, supply chain disruptions, labor shortages, and energy price increases following geopolitical events. CPI rose 4.7% in 2021 and 8.0% in 2022 — the highest since 1981.
Is CPI the only way to measure inflation?+
No. Other measures include the Personal Consumption Expenditures (PCE) price index (preferred by the Federal Reserve), the Producer Price Index (PPI), and Core CPI which excludes volatile food and energy prices. Each captures different aspects of price changes.
How is the inflation adjustment calculated?+
The formula is: Adjusted Amount = Original Amount x (CPI in target year / CPI in original year). For example, $100 in 1990 when CPI was 130.7, adjusted to 2025 when CPI is 321.4: $100 x (321.4 / 130.7) = $245.83.