Inflation Calculator Calculators
See what an amount is worth after years of inflation, in both directions.
Inflation Calculator is a free online tool that see what an amount is worth after years of inflation, in both directions. It runs entirely in your web browser using plain JavaScript, so files are processed on your own device and never uploaded to a server. There is no sign-up, no file size limit imposed by the site, no watermark and no paid tier.
- Price
- Free — no account, no quota, no watermark
- Category
- Calculators
- Where it runs
- In your browser, on your device
- Files uploaded
- None
- Technology
- plain JavaScript
- Settings
- 4
- Works offline
- Yes, after the first visit
About Inflation Calculator
Compounding works both ways: at 3% a year, prices double in about 24 years and the buying power of cash halves in the same period. That is the rule of 72 — divide 72 by the rate for a quick doubling time — and it is why holding long-term savings in cash is a slow loss rather than a safe choice.
How to use it
- Enter amount, average inflation and years.
- Adjust the remaining 1 setting if the defaults do not fit your case.
The 4 settings
| Setting | What it does | Default |
|---|---|---|
| Amount | A numeric value. | 1000 |
| Average inflation | A numeric value. | 3% |
| Years | Range 1–100. | 10 |
| Currency | Choose from 7: USD $, GBP £, EUR €, INR ₹, AUD A$, CAD C$…. | USD $ |
Under the hood
| Runs on | plain JavaScript — runs the whole thing |
| Controls | Amount, Average inflation, Years, Currency |
Questions
What inflation rate should I assume?
Central banks in developed economies generally target around 2%. Long-run historical averages tend to run higher, nearer 3%. Try both and treat the gap as your uncertainty.
What does the currency option change?
It offers 7 choices — USD $, GBP £, EUR € and INR ₹ and more. The default is USD $, which suits most cases; change it when your input or your destination calls for something specific.
What are the limits on years?
It accepts 1 to 100, starting at 10.
Is the arithmetic exact?
It uses double-precision floating point — about 15 significant figures, far more than the inputs justify. Displayed rounding is cosmetic; the underlying numbers are not rounded between steps, so chained results do not drift.