ROI Calculator
Return on investment, total and annualized.
—
Net gain / (loss)
—
ROI
—
Annualized ROI
ROI = (return − cost) ÷ cost. The annualized figure compounds the total over the holding time, which is what makes a 40% gain over 5 years look ordinary rather than stellar.
How to use the ROI tool
- Enter your roi in the fields above.
- Adjust any slider or type an exact number — the answer updates as you go.
- Copy the result and close the tab. Nothing you entered was sent anywhere.
About the ROI tool
Enter what you put in and what came back to get net gain, plain ROI percentage, and an annualized rate that compounds over the holding period.
Comparing two investments is only honest in annualized terms — a 40% gain over 5 years beats a 30% one only if the time bases are handled, which this does.
Everything runs locally in your browser: no data is uploaded, no account is needed, and it works offline once the page has loaded.
Embed this tool
Customize and copy an iframe. Linking back helps both sites.