Real Return Calculator

1. Enter the starting amount

Use the investment principal for the value projection.

2. Enter nominal return

Use the stated return before adjusting for inflation.

3. Enter inflation

Use an inflation rate covering the same period and frequency as the nominal return.

4. Set the time horizon

Enter the number of years over which both rates are assumed to compound.

5. Compare nominal and real values

Use real ending value to interpret purchasing power in starting-period dollars.

Real return = (1 + Nominal return) ÷ (1 + Inflation rate) − 1 Nominal ending value = Principal × (1 + Nominal return)^Years Real ending value = Principal × [(1 + Nominal return) ÷ (1 + Inflation rate)]^Years

Where:

• Nominal return — investment growth before inflation
• Inflation rate — change in the general price level
• Real return — purchasing-power growth rate

Assumptions: Returns and inflation are assumed constant and compounded annually. Taxes, fees, and cash flows are excluded.

What the result means

The exact Fisher equation is used rather than simply subtracting inflation. The page shows the real growth rate, nominal ending value, inflation-adjusted ending value, and purchasing-power gain or loss for the entered principal.

Investment results are illustrative and do not constitute financial advice.

Given:

• Starting investment: $25,000
• Nominal return: 7%
• Inflation: 2.5%
• Period: 4 years

Calculation:
Real return = 1.07 ÷ 1.025 − 1 = 4.3902% per year. Nominal ending value = 25,000 × 1.07^4 = $32,769.90. Real ending value = 25,000 × (1.07 ÷ 1.025)^4 = $29,688.52.

Result: Annual real return of 4.39%

Interpretation: Although the account grows to $32,769.90 nominally, its estimated purchasing power is about $29,688.52 in starting-period dollars.