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Finance formula

How to calculate inflation-adjusted value

Inflation adjustment estimates how much money is needed later to match buying power today.

See the formulaOpen calculator
Direct answer
Formula
FV = PV * (1 + i)^t

Use the table below to match each symbol with the right input. Keep units consistent before you start.

Inflation-adjusted value formula
Start here when you only need the equation and variable names.
Formula
FV = PV * (1 + i)^t

Inflation adjustment estimates how much money is needed later to match buying power today.

Variable meanings
Check each symbol, meaning, and unit before you calculate.
SymbolNameDescriptionUnit
FVFuture valueAmount needed in future dollars.currency
PVPresent valueAmount in today's dollars.currency
iInflation rateExpected annual inflation as a decimal.Depends on inputs
tYearsTime period.years
When to use this formula
Check that your situation matches the formula before you trust the result.
  • Fits budgets, salaries, savings targets, and long-term cost estimates.
Step-by-step method
Follow these steps when you are solving it by hand.
  1. 1Convert the annual inflation rate to a decimal.
  2. 2Add 1 to the rate.
  3. 3Raise the result to the number of years.
  4. 4Multiply by the present value.
Examples
These sample numbers show the order of operations and units.
Ten-year estimate
PV
$100
i
0.03
t
10
  1. 1.FV = 100(1 + 0.03)^10
  2. 2.FV = 100(1.03)^10
  3. 3.FV = 134.39
Result
$100 today is about $134.39 after 10 years at 3% inflation.
Four-year cost estimate
PV
$2,500
i
0.025
t
4
  1. 1.FV = 2500(1.025)^4
  2. 2.FV = 2759.53
Result
$2,500 today is about $2,759.53 in four years.
Mistakes to avoid
Small input or unit errors can change the answer a lot.
  • Using an annual rate where the inflation-adjusted value formula needs a monthly or period rate.
  • Entering 8 instead of 0.08 when the formula calls for a decimal rate.
  • Comparing results across different time periods without converting them first.
  • Rounding each step instead of rounding the final answer.
Open the Inflation Calculator
Open the calculator for the answer without rewriting the formula.

Enter your values in the related calculator, then compare the output with the hand method above.

Open Inflation Calculator
FAQs
Short answers for common formula questions.
Can I calculate Inflation-adjusted value by hand?

Yes. Write the units next to each value, convert rates or measurements first, and round only the final answer.

Why does my Inflation-adjusted value result differ from another calculator?

Most differences come from rounding, unit conversions, rate timing, or a slightly different version of the formula.

When is the Inflation Calculator better than hand math?

Open the Inflation Calculator to check several scenarios or skip the hand arithmetic.