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Inflation Calculator
See what an amount is worth over time at any inflation rate.
What today's amount will buy
—
Purchasing power in today's money
Amount needed to match it
—
To buy the same goods then
| Year | Prices index | What 1,000 buys | Cost of today's 1,000 |
|---|
Implied inflation rate
Between two amounts in two different years.
—
Purchasing power lost—
Prices multiply by—
Prices double in—
Quick Tool Overview
The Inflation Calculator shows both sides of the same coin: what an amount will be worth in today's money later on, and how much you would need later to match its purchasing power today. A third panel finds the implied annual rate between two amounts in two years.
- What it does
- Adjusts amounts for inflation in both directions
- You give it
- An amount, an inflation rate and a number of years
- You get back
- Future purchasing power and the equivalent future amount
- Best for
- Salary reviews, budgets, retirement planning and price comparisons
About the Inflation Calculator
Enter an amount, an inflation rate and a number of years to see both sides of the same coin: what that amount will be worth in today's money later on, and how much you would need later to match its purchasing power today.
Inflation compounds like interest, just against you, and the long-run effect surprises people. At three percent a year, prices roughly double every 24 years, so money held in cash loses about half its purchasing power over that time even though the number in the account has not moved. A third panel works out the implied annual inflation rate between two amounts in two different years, which is how you check whether a salary or a budget has actually kept pace.
Key features of the Inflation Calculator
Both directions
What today's money will be worth later, and what a later amount is worth in today's terms.
Compounding shown honestly
At three percent a year prices roughly double every 24 years, so cash loses about half its purchasing power even though the balance has not moved.
Implied rate between two amounts
Work out the annual inflation between two figures in two different years, which is how you check whether a salary has kept pace.
Any rate
Use an official figure or your own assumption, rather than a hard-coded index.
Long horizons handled
Thirty and forty year projections are where the effect actually bites, and they compute instantly.
How to use the Inflation Calculator
-
1
Enter an amount
The sum you want to compare across time.
-
2
Set the rate and years
Enter an annual inflation rate and the number of years forward or back.
-
3
Read both directions
You get the future purchasing power of today's money and the future amount needed to match it.
Frequently asked questions
Prices rise while a fixed sum stays the same, so it buys less. At 3 percent inflation, 100 today has the purchasing power of about 74 in ten years.
Nominal is the face amount. Real value is that amount adjusted for inflation, expressed in the purchasing power of a chosen year, and it is the figure that tells you whether you are actually better off.
Many central banks target around 2 percent, and long-run averages in developed economies have run near 2 to 3 percent, though actual rates vary widely by country and period. Use your own local figure where you have it.
Your investment return minus inflation, roughly. A 6 percent return with 3 percent inflation is about a 3 percent real return, which is the only part that increases what you can actually buy.
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