How to use this calculator
- Enter amount in today’s money, constant annual inflation assumption (%), number of years.
- Choose a display currency, then select Calculate. Results also update after a brief pause while you edit.
- Read the result with the assumptions below. Export details or save a second scenario to compare your choices.
Formula and method
Assumptions and limitations
A constant user-entered inflation rate, not historical CPI data or a forecast. Both amounts use one currency and a consistent basket of goods.
Worked example
At 10% annual inflation for two years, goods costing 1,000 now cost 1,210. An unchanged 1,000 then has about 826.45 of today’s purchasing power.
What the result means
Rising prices and falling purchasing power are reciprocal effects; subtracting the inflation percentage repeatedly gives the wrong compounded result.
Common questions
Are these official inflation figures?
No. The rate is your scenario; no country data is fetched.
Can this model deflation?
Yes. A negative inflation assumption reduces modeled future prices.
Methodology and transparency
Calculation specification reviewed on 2026-10-14. Mathematical implementation is tested against independent reference fixtures. This does not imply review by a licensed financial professional. Read the testing and precision policy.