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Inflation Calculator – Historical USD Value 1913-2025
How much did $100 from 1980 buy in todays money? This inflation calculator uses 112 years of US Bureau of Labor Statistics CPI-U data (1913-2025 annual averages) to show equivalent values across time, cumulative inflation, average annual inflation rate, and purchasing power loss.
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How It Works
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1
Enter the amount
How much money you want to compare across time.
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2
Pick the years
Starting year and ending year. Range: 1913 (BLS earliest) to 2025.
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3
Read the breakdown
Equivalent value, total cumulative inflation percent, average annual inflation rate over the period, and a purchasing-power summary in plain English.
Frequently Asked Questions
Where does the data come from?
US Bureau of Labor Statistics CPI-U series (Consumer Price Index for All Urban Consumers), annual averages. Bundled in the calculator JS, no API calls needed.
Why annual averages instead of monthly?
For most use cases (comparing values across years), annual averages are more interpretable than picking a specific month. For month-to-month research, the BLS publishes monthly CPI data.
What about inflation in other countries?
This is US-only. UK Office for National Statistics, Eurostat, Statistics Canada all publish equivalent CPI series. A multi-country version is on the v2 roadmap.
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