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A 30% return sounds great — until you learn inflation was 25%. Your real return, the gain in actual purchasing power, is what matters, and it's almost always lower than the headline (nominal) figure. This calculator strips inflation out of a nominal return to show what your money truly earned.
Enter the nominal return and the inflation rate, and your real return appears at once.
How is it calculated?
The formula
Real return isn't simply nominal minus inflation — that's an approximation. The exact formula divides the growth factors:
real return = (1 + nominal) ÷ (1 + inflation) − 1
For a 30% nominal return with 25% inflation: 1.30 ÷ 1.25 − 1 = 4.0%. The quick "30 − 25 = 5%" overstates it, and the gap widens as the numbers get larger.
Why it matters
Money is only worth what it can buy. If your investment grew 30% but everything you buy costs 25% more, you're only 4% better off in real terms — not 5%, and certainly not 30%. In high-inflation environments, a large nominal return can even be a real loss if it trails inflation.
Nominal vs real, at a glance
- Nominal return: the raw percentage gain, before inflation.
- Real return: what's left after inflation — your actual increase in purchasing power.
- If nominal < inflation, the real return is negative: you lost buying power despite a "positive" return.
Where it helps
- Judging whether a deposit or bond actually beats inflation
- Comparing investments across different inflation periods
- Planning long-term goals (retirement, savings) in today's money
To compound a real rate over time, use a compound interest calculator with the real return; for annualizing a multi-year gain, a CAGR calculator.
Worked example
Suppose your investment returned 30% over the year, but inflation ran at 25%. The tempting shortcut is 30 − 25 = 5% real return. The exact calculation is 1.30 ÷ 1.25 − 1 = 4.0% — a full percentage point lower, because you're measuring the gain against prices that also rose. So your purchasing power grew 4%, not 5% and definitely not 30%. Had inflation been 32%, your real return would have been 1.30 ÷ 1.32 − 1 = −1.5%: a "30% gain" that actually lost you money in real terms.
FAQ
How is real return calculated?+
Real return = (1 + nominal) ÷ (1 + inflation) − 1. For a 30% nominal return with 25% inflation, that's 1.30 ÷ 1.25 − 1 = 4.0%. Just enter the two rates.
Why not just subtract inflation from the return?+
Subtracting is a rough approximation that overstates the real return. 30 − 25 = 5% but the exact figure is 4.0%. The gap grows as the rates get larger, so the division formula is correct.
What is the difference between nominal and real return?+
Nominal is the raw percentage gain; real is what remains after inflation — your actual increase in purchasing power. Real return is what tells you if you're truly better off.
Can a positive return still be a real loss?+
Yes — if your nominal return is below inflation, your real return is negative. A 30% gain in 32% inflation is a −1.5% real return: you lost buying power despite the positive headline.
Why does real return matter for savings?+
Because money is only worth what it buys. A deposit that pays less than inflation loses real value each year. Real return tells you whether your savings are actually growing in purchasing power.
How do I compound a real return over several years?+
Apply the real rate in a compound interest calculator to see purchasing power grow over time. To annualize a multi-year nominal gain first, use a CAGR calculator.