Real Interest Rate Calculator

Calculate Real Interest Rate using the exact Fisher Equation and approximation (r = i - π). Measure true investment yields.

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How to Use Fisher Equation & Real Interest Rate Calculator

  1. Enter Nominal Interest Rate (i %).
  2. Enter Expected / Actual Inflation Rate (π %).
  3. View Exact Real Interest Rate (Fisher Eq.) and Approximate Real Rate.

Real vs Nominal Yield

A high nominal interest rate can result in negative real wealth gains if inflation exceeds the nominal rate.

Frequently Asked Questions

What is the Fisher Equation?
Exact Fisher Equation: (1 + r) = (1 + i) / (1 + π) => r = (i - π) / (1 + π). Approximate formula: r ≈ i - π.