Inflation-adjusted return calculator guide
This calculator converts a nominal investment return into a real return after inflation. It helps estimate purchasing power rather than just future dollars.
How to use it
- Enter the nominal annual return you expect.
- Enter an inflation assumption.
- Compare nominal future value with inflation-adjusted purchasing power.
Calculation method
Real return = ((1 + nominal return) ÷ (1 + inflation)) − 1
This formula is more accurate than simply subtracting inflation from return, especially over long periods.
Common mistake
A portfolio can grow in dollars while losing purchasing power if inflation is higher than the nominal return.
How to use this calculator
- Enter realistic values that match your current situation.
- Press Calculate to refresh the estimate.
- Compare the main result with the supporting details in the result panel.
- Change one input at a time to see which variable affects the result most.
Planning note: Inflation Adjusted Return Calculator gives an educational estimate. It does not include every tax rule, fee, platform policy, market condition, or personal constraint, so use it as a quick planning reference rather than a final decision.
FAQ
Is real return always lower than nominal return?
Usually yes when inflation is positive. Deflation can make real return higher than nominal return.
Should FIRE projections use real return?
Using real return is often cleaner because future spending is already expressed in today’s purchasing power.
What inflation rate should I use?
Use a conservative range. Many long-term models test 2%, 3%, and 4% inflation scenarios.