FINANCE · FREE TOOL
Inflation assumption calculator
Compare future cost and purchasing power under a constant inflation assumption.
Your inputs
Enter your values, then calculate.
Decimal-point numbers; displayed rounding does not change internal values. Calculations stay on this device.
YOUR RESULT
Make the numbers clear.
Save calculation JSON ↓Calculation breakdown
Scroll sideways to see every column. You can also focus the table and use the arrow keys.
How this calculation works
Future basket cost = amount × (1+inflation)^years. Purchasing power = amount ÷ that factor. Enter your own inflation assumption; no historical CPI lookup or forecast is included.
Check the assumptions
Use one currency consistently; financial outputs use that same currency, except the U.S. tax tool specifically uses USD. Financial models use your assumptions, not live rates or personalized financial advice. Check the result against your contract or the applicable tax rules.