How to use this calculator
- Enter nominal effective return (%), inflation over same period (%).
- Choose a display currency, then select Calculate. Results also update after a brief pause while you edit.
- Read the result with the assumptions below. Export details or save a second scenario to compare your choices.
Formula and method
Assumptions and limitations
Use the same period for return and inflation and ensure both are effective changes, not differently compounded nominal quotations.
Worked example
With nominal effective return (%) = 8, inflation over same period (%) = 3, real return is approximately 4.8543689%.
What the result means
Subtracting inflation is an approximation; this calculation uses the exact multiplicative relationship.
Common questions
How should I interpret real return?
Subtracting inflation is an approximation; this calculation uses the exact multiplicative relationship.
What should I check before using this result?
Use the same period for return and inflation and ensure both are effective changes, not differently compounded nominal quotations.
Methodology and transparency
Calculation specification reviewed on 2026-10-14. Mathematical implementation is tested against independent reference fixtures. This does not imply review by a licensed financial professional. Read the testing and precision policy.