Real Interest Calculator
Find the inflation-adjusted real return from a stated nominal interest rate.
About this calculator
Real interest rate
The real interest rate measures return in terms of actual purchasing power. A 5% nominal return with 3% inflation yields roughly 2% real return.
Central banks, economists, and long-term investors focus on real rates when comparing investments across inflation environments.
Real = (1 + Nominal) ÷ (1 + Inflation) − 1
Reference tables & standards
Example real rate interpretation
Source: Standard Fisher equation application
| Nominal rate | Inflation | Approx. real rate |
|---|---|---|
| 5% | 3% | ~1.9% |
| 4% | 4% | ~0% |
| 6% | 2% | ~3.9% |
| 2% | 5% | ~-2.9% (losing purchasing power) |
Negative real rates mean money grows slower than prices — purchasing power falls.
Calculations are for educational and planning purposes only. They are not financial, tax, or investment advice. Rates, fees, and inflation assumptions vary in real markets.