Inflation Calculator – US CPI Purchasing Power Calculator
Find out what a dollar amount from any year is worth in any other year, from 1913 to 2025. Uses official BLS CPI-U data. Calculates total inflation, annual rate, and shows a full year by year breakdown.
How This Inflation Calculator Works
This inflation calculator uses US Bureau of Labor Statistics CPI-U (Consumer Price Index for All Urban Consumers) annual average data from 1913 to 2025. The CPI-U is the most widely used measure of US inflation, covering about 93% of the US population and tracking price changes in a representative basket of goods and services.
The calculation is a straightforward ratio: adjusted amount = original amount × (CPI in target year / CPI in base year). This tells you how much purchasing power has changed, what a given dollar amount could buy then versus now. Total inflation is expressed as a percentage change, and average annual rate is calculated using the compound formula: (ratio ^ (1 / years) – 1) × 100.
The year by year breakdown table shows the CPI value for each year in the span, the annual inflation rate for each year, and the equivalent value of your amount in that year’s dollars. This lets you see exactly when inflation spiked (the 1970s energy crisis, the 2021 to 2022 post pandemic surge) and how your purchasing power changed year by year.
What this tool does
How to use it
Enter amount
Type the dollar amount you want to adjust. Decimals are supported for precise calculations.
Choose years
Select the starting year and the target year. Swap them with the arrow button to reverse the calculation.
Calculate
Click Calculate. Results show the adjusted amount, total inflation, annual rate, and CPI values for both years.
View breakdown
Enable the year by year breakdown to see CPI and annual inflation rate for every year in the span.
Questions About the Inflation Calculator
This calculator uses the US Bureau of Labor Statistics (BLS) Consumer Price Index for All Urban Consumers (CPI-U), Series CUUR0000SA0, with base period 1982 to 84=100. The CPI-U measures price changes across approximately 93% of the US population. Annual average values are used rather than monthly values, so the results represent full year averages rather than month to month snapshots. Data covers 1913 to 2025.
The formula is: adjusted amount = original amount multiplied by (CPI in target year divided by CPI in base year). For example, to find what $100 in 1980 is worth in 2025: CPI 1980 = 82.4, CPI 2025 = 319.8, ratio = 319.8 / 82.4 = 3.881. So $100 x 3.881 = $388.10 in 2025 dollars. This tells you that prices in 2025 are about 3.88 times higher than in 1980, $100 in 1980 had the same purchasing power as roughly $388 today.
CPI-U covers all urban consumers (about 93% of the US population) and is the most commonly cited inflation measure. CPI-W (Urban Wage Earners and Clerical Workers) covers a subset of the urban population, roughly 28%, focused on wage earners. CPI-W is used to calculate Social Security COLA adjustments. For general inflation research and historical dollar comparisons, CPI-U is the standard choice. There is also the Chained CPI (C-CPI-U), which accounts for consumer substitution and tends to show slightly lower inflation than CPI-U.
The 1970s inflationary period was driven by multiple converging factors. The 1973 OPEC oil embargo quadrupled oil prices, raising the cost of goods and transportation across the economy. Expansionary fiscal policy in the late 1960s (funding the Vietnam War and Great Society programs) had already increased money supply. The abandonment of the gold standard in 1971 removed a key constraint on dollar creation. Peak annual CPI-U inflation hit 13.5% in 1979. Federal Reserve Chair Paul Volcker broke the inflation cycle by raising interest rates sharply (the federal funds rate reached 20% in 1981), causing a painful recession but bringing inflation under 4% by 1983.
No. This calculator uses the national CPI-U, which is a weighted average across the entire United States. The BLS does publish regional CPI data and city specific indices, but these are only available for larger metropolitan areas and shorter time spans. Housing costs, for example, vary enormously by region, San Francisco and rural Mississippi have very different inflation experiences for housing. For most general comparisons, the national CPI-U is the appropriate benchmark.
The CPI is designed to measure average price changes for a representative consumer, so it may not match any individual experience. It can understate inflation for groups who spend heavily on housing in high cost areas, medical care (which tends to rise faster than overall CPI), or college tuition. It may overstate inflation because it does not fully account for quality improvements (a newer laptop costs the same but does far more), or for the shift to cheaper substitutes when prices rise. These limitations are well documented by economists and are why the BLS also publishes the Chained CPI and several other specialized indices.
Yes, this is a common use. If a role paid $50,000 in 2000, you can calculate what that is worth in today’s dollars to assess whether current compensation is genuinely competitive. The result tells you the real (inflation adjusted) value. Keep in mind that wage growth and inflation do not always track together, some sectors have seen real wage growth, meaning wages rose faster than inflation, while others have seen real wage decline. For salary benchmarking, compare the inflation adjusted figure to current market rates in your specific field and location.
Deflation is when the general price level falls, a dollar buys more over time rather than less. The US experienced mild deflation during 1921, 1927 to 1928, the Great Depression years 1930 to 1933, and briefly in 2009. The calculator handles this correctly: if CPI in the target year is lower than in the base year, the ratio is below 1 and the adjusted amount will be smaller than the original, reflecting that money was worth more (not less) in the target year. Total inflation will show as a negative percentage in those cases.