Inflation Calculator
Run inflation forward or backward at a flat average rate: see what today's money will need to be in the future to hold the same purchasing power, or what a past amount equals in today's dollars.
TheCalculators — Inflation Calculator
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Needed in 10 Years
$134.39
$100 at 3.00% average inflation
- Base Amount
- $100
- Inflation Factor
- 1.344×
- Cumulative Inflation
- 34.4%
- Real Purchasing Power Lost
- 25.6%
Equivalent value over time
Summary
A flat rate is a simplification — actual CPI varies year to year. Historically U.S. inflation has averaged roughly 3%.
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Formula
Future equivalent = Amount × (1 + i)^n; Past equivalent = Amount / (1 + i)^n
Pro tips
- • At 3% inflation, prices double about every 24 years — the "rule of 72" applies to inflation too.
- • Compare this future cost with your investment growth: what matters is the real (after-inflation) return.
FAQ
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