What is the ROI Calculator?
The roi calculator is a free online tool that helps you work out roi quickly and accurately. It uses the standard formula ROI = (Final value - Amount invested) / Amount invested x 100 and shows the result instantly as you type, along with a full breakdown so you can see exactly how the answer was reached.
How to use this calculator
- Enter the amount you invested.
- Enter the final value received.
- Read your profit and ROI.
Formula used
ROI = (Final value - Amount invested) / Amount invested x 100Explanation of each input
- Amount invested โ the amount invested used in the calculation.
- Final / returned value โ the final / returned value used in the calculation.
Understanding your result
- Net profit โ the calculated net profit.
- ROI โ the calculated roi in %.
Step-by-step calculation
For the example values Invested 100000, returned 150000:
- Apply the formula:
ROI = (Final value - Amount invested) / Amount invested x 100 - Substitute the values: (150000-100000)/100000 x 100
- Result: Profit 50000; ROI = 50%
Worked example
| Inputs | Invested 100000, returned 150000 |
|---|---|
| Working | (150000-100000)/100000 x 100 |
| Result | Profit 50000; ROI = 50% |
Benefits and practical uses
This calculator saves you time and reduces errors when you need roi. It is useful for students, professionals and anyone who wants a fast, reliable answer without manual calculation. Results update instantly, work in your browser and can be copied or shared in one click.
Assumptions and limitations
- Ignores holding period and taxes.
Frequently asked questions
What is a good ROI?
It depends on the asset and risk. ROI is best compared against alternatives over the same period.
Does ROI account for time?
No. For time-adjusted comparison use CAGR or annualised ROI.