Free ROI Calculator – Calculate Return on Investment

What Is ROI and How the ROI Calculator Works

Return on investment measures what you got back relative to what you put in, expressed as a percentage so that any two investments can be compared on the same scale. Enter the amount you invested and the value you ended up with, and the calculator returns the ROI percentage plus the net profit or loss in rupees. It is the most widely quoted number in business precisely because it is simple: a marketer judging an ad campaign, an investor reviewing a stock exit, a shop owner deciding whether a new freezer paid for itself, and a founder pitching to investors all speak this language. A ₹5,000 campaign and a ₹5,00,000 machine cannot be compared by profit alone, but their ROI figures sit side by side comfortably. The formula is ROI = ((gain − cost) ÷ cost) × 100. Cost is everything you invested, gain is the final value or total returned, and the difference is your net profit. Note the denominator: it is the cost, which is what makes ROI a measure of efficiency rather than size. A positive result means you made money and a negative one means you lost part of your capital. There is no time component anywhere in the equation, and that absence is the single most important thing to understand about ROI — it says nothing about how long your money was tied up. Work a real case. You invest ₹10,000 and it grows to ₹15,000. Net profit is 15,000 − 10,000 = ₹5,000, and ROI is (5,000 ÷ 10,000) × 100 = 50 per cent. Now a losing case: you put ₹45,000 into inventory that only sells for ₹38,000. Net is −₹7,000 and the ROI is −15.56 per cent, which the calculator shows as a clear negative rather than hiding it. And a marketing case: ₹80,000 spent on ads generating ₹2,40,000 in attributable revenue gives a net of ₹1,60,000 and a 200 per cent ROI, the kind of figure that decides next quarter's budget. The scenarios are concrete. A restaurant owner who spent ₹1,20,000 on a delivery-partner tie-up tallies the incremental orders to see whether it earned its keep. A trainer comparing two ad platforms runs each one's spend and revenue through the same formula to decide where the next rupee goes. Someone who bought equipment can check whether the productivity gain covered the purchase before buying a second unit. A person weighing a course fee against the salary bump it produced can put a number on the decision instead of a feeling. A landlord who spent ₹3,50,000 renovating a flat can compare the extra annual rent against that outlay to see how many years the work takes to repay itself, which is a more honest test than assuming any improvement adds value. The caveat is the time blindness, and it matters enormously. A 50 per cent ROI earned in one month is spectacular; the same 50 per cent stretched across five years works out to just 8.45 per cent a year, which barely beats a fixed deposit. Always pair the ROI figure with the holding period, and switch to CAGR when the periods differ. Two smaller cautions: this is a headline figure that excludes brokerage, taxes, GST, and inflation, all of which shrink the real return, and the cost side must include everything you actually spent, since leaving out setup fees or your own unpaid time inflates the result. Treat ROI as one input among several rather than the verdict, and remember that a high figure on a tiny base is easy to achieve and rarely worth celebrating. This is not financial advice. Everything runs in your browser, so your figures are never uploaded or stored.

ROI Calculator Formula & Method

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