ROI Calculator
Calculate return on investment as a percentage and net gain.
How to use the ROI Calculator
Enter your values and pick a mode if the tool offers one.
Click calculate — results appear instantly, computed in your browser.
Copy the result or save the tool to your favorites.
Frequently asked questions
(Final value − amount invested) / amount invested × 100.
Yes — if the final value is below what you invested, ROI is negative.
No. It shows total ROI over the period, not a per-year figure.
No. Subtract those from the final value first if you want a net figure.
In your browser only.
About the ROI Calculator
Return on Investment, or ROI, measures how much you gained or lost on an investment relative to what you put in, expressed as a percentage. This calculator takes the amount you invested and the final value, and returns both the net gain and the ROI percentage, giving you a clear measure of how well the investment performed.
How ROI is calculated
ROI is the net gain divided by the amount invested, multiplied by one hundred. The net gain is simply the final value minus the original investment. So if you invested 50,000 and it grew to 65,000, the gain is 15,000 and the ROI is 30%. A negative result means the investment lost value, and the ROI percentage shows how large that loss was relative to your stake.
What ROI does and does not tell you
ROI is excellent for comparing the relative performance of different investments on a like-for-like basis, because it normalises gains against the amount risked. A 15,000 profit sounds good until you learn it required a 500,000 investment, a 3% return. ROI exposes that. However, plain ROI ignores time. An investment returning 30% over one year is far better than 30% over ten years, yet both show the same ROI. For time-sensitive comparisons you need an annualised return, which ROI alone does not provide.
Common uses
Investors use ROI to evaluate stocks, mutual funds, property, and business ventures. Marketers use it to judge whether a campaign earned more than it cost. Business owners use it to decide between competing projects competing for the same capital. In each case ROI answers the same question: for every rupee I committed, how much did I get back?
Tips and caveats
For a fair comparison, use consistent figures: subtract fees, taxes, and transaction costs from the final value first, or you will overstate the return. Remember that ROI does not account for the holding period, so when comparing investments held for different lengths of time, also consider an annualised figure. It also ignores risk; a high ROI achieved through high risk is not directly comparable to a modest ROI from a safe asset. For regular investments rather than a lump sum, the SIP Calculator models periodic contributions, and the Profit Margin Calculator handles trading margins. Calculations run entirely in your browser.