Calculator
Inflation Calculator
Calculate purchasing power over time using historical CPI data. See what your money is worth past or future.
📈
Inflation Calculator
Historical CPI data 1960–2024 · Buying power erosion chart
📌 Mode
How much would a historical dollar amount be worth in today's money?
🔢 Inputs
💡 Results
$100.00 in 1990 =
$240.24
today's dollars
Total Inflation
140.2%
over 34 years
Avg Annual Inflation
2.61%
per year
Buying Power Lost
$140.24
extra needed today
📉 Buying Power Erosion
How much is $100 worth over 30 years at different inflation rates?
| Year | 3% / yr | 4% / yr | 5% / yr |
|---|---|---|---|
| Year 0 | $100.00 | $100.00 | $100.00 |
| Year 5 | $86.26 | $82.19 | $78.35 |
| Year 10 | $74.41 | $67.56 | $61.39 |
| Year 15 | $64.19 | $55.53 | $48.10 |
| Year 20 | $55.37 | $45.64 | $37.69 |
| Year 25 | $47.76 | $37.51 | $29.53 |
| Year 30 | $41.20 | $30.83 | $23.14 |
ℹ️ About This Calculator
• CPI data sourced from approximate historical US Bureau of Labor Statistics averages (1960–2024).
• Past→Present uses actual CPI ratios. Present→Future uses a compounding formula with your chosen rate.
• The default future inflation rate of 3.5% is slightly above the Fed's 2% target to reflect realistic long-term averages.
• This calculator is for educational purposes. Actual inflation varies by goods, region, and time period.