Calculate return on investment with inflation adjustment across 8 currencies. Compare your ROI against Treasury rates and discover your real purchasing power gains.
Enter your investment information to calculate ROI
Amount you initially invested
Current or final value of investment
How long the investment lasted
Most ROI calculators only show basic percentage returns. Our advanced calculator reveals what your investment REALLY earned by accounting for:
A 50% return over 5 years sounds impressive, but if inflation averaged 3% annually during that period, your real purchasing power only increased by about 35%. This is the difference between nominal returns (what you see in your account) and real returns (what you can actually buy).
Our calculator shows both, giving you a complete picture of your investment performance.
Every investment carries risk. The question is: were you properly compensated for that risk? By comparing your return to Treasury rates (the "risk-free" rate), you can see whether your investment justified its risk.
If you earned 8% while 10-year Treasuries paid 4.5%, you earned a 3.5% "risk premium" - your reward for taking on investment risk. If you earned less than Treasuries, you took risk without being rewarded.
For international investors or expats, understanding returns in multiple currencies is crucial. A US stock that gained 40% over 5 years might show different real returns when adjusted for inflation in GBP, EUR, or JPY. Our calculator supports 8 major currencies with real inflation data.
Investment gains are taxed, and those taxes significantly impact your true return. In the US:
Our calculator lets you input your expected tax rate to see after-tax, inflation-adjusted returns - the number that matters most.
Common questions about inflation and our calculator