ROI Calculator
Use this free online ROI Calculator to calculate return on investment. It works instantly in your browser, and your data never leaves your device.
About the ROI Calculator
ROI = (gain - cost) / cost x 100, with annualised return over any period.
How to use the ROI Calculator
- Enter your values in the fields above.
- The ROI Calculator updates the result instantly as you type.
- Copy the result or change any value to compare scenarios.
Features
- Free with no signup and no daily limits
- Private: runs entirely in your browser
- Works on mobile, tablet and desktop
- Instant results with no button to press
- Clean, fast interface with no popups
Frequently asked questions
Is the ROI Calculator free to use?
Yes. The ROI Calculator is completely free with no signup, no limits on normal use and no watermark.
How accurate is this calculator?
Calculations use standard formulas with full floating point precision. Results are rounded only for display. For financial or medical decisions, confirm with a professional.