Inflation calculator
A falling chart shows real value — and how much you would need later to buy the same thing.
100% in browser — No files or data are sent to a server. Everything runs on your device.
Estimate inflation’s effect on an amount you have today. Enter the sum, a constant annual rate and a term: the tool shows remaining purchasing power and how much you would need in the future to keep the same standard.
The chart falls year by year so the loss is visible. It does not fetch official CPI series — you pick the rate to explore scenarios.
The calculation stays in your browser. It is an educational illustration, not an official forecast or financial advice.
Frequently asked questions
Do you pull CPI automatically?
No. Enter the rate you want to simulate. Nothing is fetched from external APIs.
Is inflation compounded annually?
Yes. Purchasing power in year n is amount / (1 + i)^n.
What is the future equivalent?
How much you would need in n years to buy what this amount buys today.
Are my numbers sent to a server?
No. Everything stays on your device.