Calculate the real return of an investment after inflation and optional tax, with the exact Fisher formula. Enter your values; the result updates as you type, with the method shown below.
Formula
Real = (1 + nominal) / (1 + inflation) − 1
Worked example
5% nominal with 2.5% inflation: 2.44% real.
Frequently asked questions
Why not just subtract inflation?
The exact formula divides; subtraction is an approximation.
Is a negative real return possible?
Yes, when inflation exceeds the return.
Is the Livret A real return positive?
It depends on the year’s rate and inflation.
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Results are estimates for information only. Check important figures with a professional.