Real Rate of Return Calculator – Adjust Returns for Inflation

How to Use the Real Rate of Return Calculator

Enter the nominal investment return and inflation rate to estimate how much purchasing power actually changed.

Practical Example

A nominal return of 8% with 3% inflation produces a real return of about 4.85% using the exact inflation-adjusted formula.

Factors That Affect the Result

Nominal return, inflation measurement, time period and compounding assumptions affect the real return.

Frequently Asked Questions

Why adjust returns for inflation?

Inflation reduces the purchasing power of nominal gains.

Is real return simply return minus inflation?

That is an approximation; the exact calculation accounts for compounding.

Can real return be negative?

Yes, when inflation exceeds the nominal investment return.

Nominal Return vs Real Return

A real rate of return adjusts an investment's nominal return for inflation to estimate the change in purchasing power. A common exact relationship is (1 + nominal return) ÷ (1 + inflation rate) − 1. For example, a 7% nominal return with 3% inflation gives a real return of about 3.88%, not exactly 4%, although subtraction can be a useful rough approximation at low rates. Real return helps compare investment growth with changes in the cost of goods and services. It does not automatically account for taxes, fees or an investor's personal spending pattern, all of which can affect actual purchasing power. Use rates covering the same time period and express percentages consistently. Historical inflation and investment returns also do not guarantee future outcomes, so the calculation is best treated as an analytical comparison rather than a forecast.