ROI Calculator
Compute Return on Investment (ROI) from gain and investment cost. Enter your values, click Calculate, and get the full result with its breakdown — everything is processed on your device, nothing is sent to a server.
All calculations run in your browser. Your data is never sent to our servers.
Example
Example Input
gain 1500, cost 1000
Example Output
50% ROI
How to Use
- 1Fill in each input field with the values you want to compute.
- 2If there are choices (units, mode, operation), pick what you need.
- 3Click the Calculate button (or press Ctrl+Enter).
- 4The main result and its breakdown appear in the Result area. Click Copy to copy it.
About the ROI Calculator
The ROI Calculator computes Return on Investment: (gain − cost) / cost × 100%. It also shows the net profit. ROI measures how efficient an investment is relative to its cost.
Useful for comparing investments, marketing campaigns, and business decisions.
FAQ
Is this ROI Calculator accurate?
Yes. It uses standard formulas and runs directly in your browser at full JavaScript precision (plus BigInt/decimal.js for large numbers where needed).
Is my data sent to a server?
No. All calculations happen entirely on your device. No values are sent to or stored on our servers.