The Concept
What is the future value of money adjusted for inflation?
The standard future value of money tells you how many dollars you will have later. But dollars in the future do not buy as much as dollars today, because inflation steadily raises prices. The inflation-adjusted future value — the real value — corrects for that, converting the future dollar amount back into today's purchasing power so you can see what it is truly worth.
This calculator shows both numbers side by side: the nominal future value your money grows to, and the real value once inflation is stripped out. For the raw, nominal figure on its own, the future value of money calculator covers that, and the homepage compound interest calculator also builds inflation into a fuller projection.
The Two Values
Nominal value vs real value
Every future value has two readings, and this calculator reports both:
- Nominal value — the raw number of dollars, exactly what an account balance would show. $10,000 at 7 percent for 20 years grows to about $40,387.
- Real value — that same amount expressed in today's purchasing power after 3 percent annual inflation, which comes to about $22,362. That is what the money could actually buy in today's terms.
The difference — roughly $18,026 here — is not money you lose from the account. It is the purchasing power that inflation quietly erodes. Watching both figures keeps a big nominal number from creating a false sense of how far it will really stretch.
How To
How to use this calculator
Four inputs drive the result:
- Amount of money today — the sum you want to project forward.
- Annual return rate — the yearly growth rate you expect the money to earn.
- Annual inflation rate — how fast prices rise; 2 to 3 percent is a common assumption.
- Number of years — how far into the future to look.
The result shows the nominal future value, the real value in today's money, and the purchasing power lost to inflation. Returns are compounded monthly. Open the breakdown to see the two values diverge year by year.
The Formula
The inflation-adjusted future value formula
It is a two-step calculation. First grow the money to its nominal future value:
Nominal FV = PV × (1 + r/n)n×t
Then discount that back into today's purchasing power using the inflation rate:
Real FV = Nominal FV ÷ (1 + i)t
Here PV is the amount today, r is the annual return, n is the number of compounding periods per year, i is the annual inflation rate, and t is the number of years. The second step is the same discounting used for present value — here it is applied to inflation rather than to a rate of return. The future value formula guide covers the growth step in detail.
Example
Example: $10,000 with inflation
Here is $10,000 growing at 7 percent, compounded monthly, alongside its real value after 3 percent annual inflation. The two figures drift further apart the longer the money is invested.
| Years | Nominal value | Real value (today's money) | Power lost |
|---|
| 5 years | $14,176 | $12,229 | $1,948 |
| 10 years | $20,097 | $14,954 | $5,143 |
| 20 years | $40,387 | $22,362 | $18,026 |
| 30 years | $81,165 | $33,439 | $47,726 |
After 30 years the nominal balance looks like $81,165, but in today's money it is worth about $33,439. The money still grows in real terms — because 7 percent beats 3 percent — just far less dramatically than the headline number implies.
Inflation
How the inflation rate changes real value
Real value is highly sensitive to the inflation rate you assume. Here is the same $10,000 at 7 percent over 20 years — nominal value about $40,387 in every row — shown in today's money at different inflation rates:
| Inflation rate | Real value after 20 years |
|---|
| 2% | $27,180 |
| 3% | $22,362 |
| 4% | $18,432 |
| 5% | $15,222 |
Moving from 2 percent to 5 percent inflation nearly halves the real value, even though the nominal figure never changes. That is why testing a higher inflation rate is worthwhile when the time horizon is long.