Calculating your real rate of return is straightforward once you know the Real Rate of Return formula and what each input means. This guide explains the method in plain language, walks through a manual calculation, and gives worked examples you can follow — then you can do it instantly with the Real Rate of Return Calculator.
What is Real Rate of Return?
The Real Rate of Return calculation tells you your real rate of return from a few simple inputs. The figure you are solving for here is the real rate of return, expressed in percent.
The Real Rate of Return formula
The core formula is:
Real rate of return = ((1 + Nominal return rate ÷ 100) ÷ (1 + Inflation rate ÷ 100) - 1) × 100Here is what each input means:
- Nominal return rate — a percentage, such as an annual rate. Example: 12%.
- Inflation rate — a percentage, such as an annual rate. Example: 6%.
How to calculate it step by step
- Write down the nominal return rate (for example, 12%).
- Write down the inflation rate (for example, 6%).
- Apply the formula above to get your real rate of return.
- Double-check the result with the Real Rate of Return Calculator.
Worked examples
Example 1
| Input / Output | Value |
|---|---|
| Nominal return rate | 12% |
| Inflation rate | 6% |
| Real rate of return | 5.660% |
| Approximate (nominal − inflation) | 6.00% |
With nominal return rate of 12% and inflation rate of 6%, the real rate of return works out to 5.660%.
Example 2
With nominal return rate of 24% and inflation rate of 6%, the real rate of return works out to 16.981%.
| Result | Value |
|---|---|
| Real rate of return | 16.981% |
| Approximate (nominal − inflation) | 18.00% |
Example 3
With nominal return rate of 6% and inflation rate of 6%, the real rate of return works out to 0.000%.
| Result | Value |
|---|---|
| Real rate of return | 0.000% |
| Approximate (nominal − inflation) | 0.00% |
Tips for an accurate result
- Keep your units consistent — mixing, say, months with years or grams with kilograms is the most common source of error.
- Round only at the very end. Rounding inputs early can shift the final answer noticeably.
- Re-run the numbers whenever an input changes, rather than estimating from an old result.
- Annual rates must be converted to the period you are calculating for (for example, divide an annual rate by 12 for a monthly figure).
Prefer not to do the maths by hand? — the Real Rate of Return Calculator does it instantly, for free, with the formula and a worked example built in.
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