Inflation Calculator

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See what an amount of money is worth after inflation. Enter a sum, a start and end year and an average annual rate to find its equivalent future value.

$
%
Equivalent value in :year –
Total inflation –
Cumulative change –
Annual rate used –
Purchasing power –
Uses compound inflation: value × (1 + rate)^(end − start). The rate is a flat average; actual year-to-year inflation varies.

About Inflation Calculator

The Inflation Calculator shows what a sum of money will be worth after inflation. Enter an amount, a start year, an end year and an average annual inflation rate, and it returns the equivalent value, the cumulative price change and how much purchasing power is gained or lost.

It applies compound inflation: value × (1 + rate)^(years between start and end). At 3% per year, prices double roughly every 24 years, which is why the effect looks small annually but large over decades. The rate is a flat average — real inflation varies year to year.

Use it to sanity-check retirement targets, adjust a historical price to today’s terms, or see what a salary that “stays the same” actually loses each year. Free and instant, calculated in your browser.

How to use Inflation Calculator

  1. Enter the amount of money.
  2. Set the start year and the end year.
  3. Enter an average annual inflation rate (central banks often target around 2%).
  4. Read the equivalent value in the end year, the total inflation over the period and the change in purchasing power.

Frequently asked questions

With compound growth: value × (1 + rate)^(end year − start year). $1,000 at 3% over 20 years becomes about $1,806 — meaning you would need $1,806 then to buy what $1,000 buys now.

Around 2% matches the target of most major central banks and long-run averages in developed economies; 3% is a conservative planning figure. For historical periods, look up the actual average CPI change for your country.

It shows how much less (or more) the same nominal amount buys at the end year. At 3% over 20 years, money loses about 45% of its buying power — nearly half its real value.

Yes. Enter a negative rate to model deflation, or set the end year before the start year to discount a modern amount back to an earlier year’s equivalent.

They are estimates, not financial advice. A flat average smooths over real year-to-year swings, and your personal inflation depends on what you buy — housing, energy and food often move differently from headline CPI.
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