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Real Return After Inflation (Fisher Equation) Calculator

(1 + r_real) = (1 + r_nominal) / (1 + π).

Compute the inflation-adjusted real rate of return from a nominal return and an inflation rate using the exact Fisher equation: r_real = (1 + r_nominal) / (1 + π) − 1. Also reports the simpler approximation r_real ≈ r_nominal − π for comparison.

Nadia Almasri By Nadia Almasri
Published Last reviewed 1 min read

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Results

Enter values and click Calculate to see results.
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How to use this calculator

  1. Fill in the inputs above using the units you already have.
  2. Values update automatically as you type — no submit button needed.
  3. Hover any result row for the underlying formula and intermediate values.

Formula

r_real = (1 + r_nom) / (1 + π) − 1.

In depth

Compute the inflation-adjusted real rate of return from a nominal return and an inflation rate using the exact Fisher equation: r_real = (1 + r_nominal) / (1 + π) − 1. Also reports the simpler approximation r_real ≈ r_nominal − π for comparison.