ROI Calculator
Result
ROI Calculator ROI is a fast, free finance calculator. Enter Net Profit/Gain and Investment Cost to get an instant, accurate result — complete with the formula, a step-by-step worked example, and answers to common questions, all on one page and private to — free online calculator.
Formula
- Calculation based on the stated inputs and formula. Assumes constant rates and excludes fees or taxes unless explicitly entered. Educational estimate only.
- The main inputs are Net profit or gain, Investment cost. Enter them in the units and format shown in the calculator.
- Use monetary amounts, rates and time periods exactly as labeled; the result reflects the assumptions entered on this page.
- Changing any input above recalculates the result with the same calculation engine used by this page.
Example: ROI
- Net profit or gain: 300
- Investment cost: 1000
Example inputs: Net profit or gain = 300; Investment cost = 1000. Calculated result: ROI (%): 30.
Sample result: Calculating…
Frequently asked questions
What does the ROI calculate?
Define gain and cost consistently for a meaningful comparison.
Which values should I enter?
Enter Net profit or gain, Investment cost using the units and format shown beside each field.
What formula does this calculator use?
The calculator uses the following relationship: ROI = Net profit / Investment cost × 100.
Why might my result differ from another source?
Results can differ when another source uses different units, rounding rules, conventions or assumptions. Compare the inputs and definitions before comparing results.
Does the result update automatically?
Yes. Changing an input updates the result using the same calculation engine shown on this page.