Inflation Calculator
What is money from the past worth today? Compare buying power between any two years since 1913, using official US CPI data updated to September 2026.
- Cumulative inflation
- 95.7%
- Average per year
- 2.59%
$100.00 in 2000 has the same buying power as $195.67 in September 2026. Prices rose 95.7% over the period, an average of 2.59% a year.
How it's calculated
Value then in today's money = amount × CPI(to) ÷ CPI(from)
Example
$100.00 in 1990 has the same buying power as $257.88 in September 2026. Prices rose 157.9% over the period, an average of 2.65% a year.
Source: US Bureau of Labor Statistics, Consumer Price Index for All Urban Consumers: All Items in U.S. City Average (CPIAUCNS), retrieved from FRED, Federal Reserve Bank of St. Louis. Latest data: September 2026. See also today's CPI inflation rate.
This product uses the FRED® API but is not endorsed or certified by the Federal Reserve Bank of St. Louis.
This is Step 3 of The MacroInsight Process: the core portfolio. Real, after-inflation returns are the ones that count for the core portfolio.
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