The ROI Calculator is a free tool that helps you calculate roi using the formula ROI = (Final value - Amount invested) / Amount invested x 100. Enter your values above and press Calculate to get net profit, roi instantly, with a full step-by-step breakdown.
What is the ROI Calculator?
The roi calculator is a free online tool that helps you calculate roi quickly and accurately. It applies the standard formula ROI = (Final value - Amount invested) / Amount invested x 100 to the values you enter and, when you press Calculate, displays the result together with a clear, step-by-step explanation of how the answer was reached.
Also known as: return calculator, roi formula, return on investment formula, investment return calculator, rate of return formula, rate of return calculator.
How to use the ROI Calculator
- Enter the amount you invested.
- Enter the final value received.
- Read your profit and ROI.
Formula used
The roi calculator is based on this formula:
ROI = (Final value - Amount invested) / Amount invested x 100Each term in the formula corresponds to one of the inputs explained below. The calculator performs the arithmetic for you and shows every step so you can check the working by hand if you wish.
Worked example
Suppose you enter Invested 100000, returned 150000. The calculator works as follows:
| Inputs | Invested 100000, returned 150000 |
|---|---|
| Working | (150000-100000)/100000 x 100 |
| Result | Profit 50000; ROI = 50% |
Step-by-step calculation
- Apply the formula:
ROI = (Final value - Amount invested) / Amount invested x 100 - Substitute your values: (150000-100000)/100000 x 100
- Read the result: Profit 50000; ROI = 50%
Inputs explained
- Amount invested — the amount invested used in the calculation.
- Final / returned value — the final / returned value used in the calculation.
Understanding your result
- Net profit — the calculated net profit.
- ROI — the calculated roi in %.
Benefits and practical uses
The roi calculator saves time and removes the risk of manual errors when you need to calculate roi. It is useful for students, professionals and anyone who wants a fast, dependable answer. Results update the moment you press Calculate, work on any device, and can be copied or shared in a single click — and because the maths runs in your browser, your figures stay completely private.
Tips for an accurate result
- Keep all related inputs in the same units.
- Use the worked example above to confirm you are entering values in the right places.
- Review the assumptions below so the result fits your situation.
- Press Reset to clear everything and try a different scenario.
Common mistakes to avoid
- Entering values in the wrong unit (mismatched units give wrong answers).
- Leaving a required field empty — the calculator will ask you to fill it in.
- Confusing the annual rate with a monthly rate, or tenure in years with months.
- Treating the estimate as a guaranteed return — markets and rates vary.
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.
How do I use the ROI Calculator?
Enter your values in the fields, then press the Calculate button to see the result. Use Reset to clear the form and start again. Nothing is calculated until you click Calculate.
What formula does the ROI Calculator use?
It uses the standard formula: ROI = (Final value - Amount invested) / Amount invested x 100. The full step-by-step working is shown with every result so you can verify it.
What information do I need to use the roi calculator?
You need: amount invested, final / returned value. Sensible example values are pre-filled so you can see how it works.
Is the ROI Calculator free to use?
Yes. Every DigiToolkit calculator is completely free, with no sign-up, no login and no usage limits.
Does the ROI Calculator work on mobile phones?
Yes. The calculator is mobile-first and works on phones, tablets and computers in any modern browser.
Do I need to install an app?
No. The roi calculator runs directly in your web browser — there is nothing to download or install.
Is my data private when I use this calculator?
Yes. All calculations run inside your browser. The numbers you enter are never uploaded to a server or shared with anyone.
How accurate is the ROI Calculator?
It uses the generally accepted formula for roi and computes to several decimal places. Results are accurate for the assumptions listed on this page.
Can I copy or share my result?
Yes. After calculating, use the Copy button to copy the result, or Share to copy the page link.
Why is nothing showing until I press Calculate?
By design, the calculator only computes when you press Calculate, so you can finish entering all your values first. Press Reset any time to clear everything.