ROI Calculator
Calculate your Return on Investment (ROI) to measure how profitable an investment was. Enter the initial cost and final value to see total ROI, net profit, and annualized return.
Formula reviewed for accuracy. Our methodology & sources
ROI Calculator
business calculator
How It Works
The calculator produces two different but related numbers, and knowing which to use is the whole point. It starts by subtracting your initial investment from its final value to find the net profit — the actual dollars you gained or lost. It then divides that profit by what you originally put in and multiplies by 100 to express it as total ROI, a percentage. Total ROI answers "how much did this grow overall?" A $10,000 investment that becomes $15,000 has a $5,000 profit and a 50% total ROI, regardless of whether that took one year or ten. That time-blindness is exactly why total ROI can mislead you, and why the calculator also computes annualized ROI. A 50% gain earned in one year is a spectacular return; the same 50% spread over ten years is a mediocre one of roughly 4% per year. Annualized ROI removes the distortion by using compounding: it finds the constant yearly rate that, compounded over your holding period, would turn the initial value into the final value. The formula is (Final ÷ Initial) raised to the power of (1 ÷ years), minus 1. Because it puts every investment on a common per-year footing, annualized ROI is the honest way to compare a stock held for three years against a property held for eight or a business project that paid off in eighteen months. Two pitfalls are worth flagging. First, simple ROI ignores everything that happens between the start and end points — dividends, interim cash flows, and additional contributions — so for investments with ongoing income you may want a more complete measure such as internal rate of return. Second, ROI as calculated here is a nominal, pre-tax, pre-inflation figure: a 6% annualized return during a period of 4% inflation is only about 2% in real purchasing power, and taxes on gains reduce it further. Treat ROI as a clean comparison of headline performance, not as your take-home result.
Formula
ROI = (Final Value − Initial) / Initial × 100 Annualized ROI = (Final/Initial)^(1/years) − 1
Examples
$10K grows to $15K in 3 years
50% total ROI, about 14.5% annualized.
Frequently Asked Questions
What is ROI?
Return on Investment (ROI) measures the gain or loss on an investment relative to its cost, expressed as a percentage. The formula is (Net Profit ÷ Investment Cost) × 100. It is the most widely used single number for judging whether an investment or business decision paid off.
What is a good ROI?
It depends heavily on the asset and the risk involved. As a benchmark, the US stock market has historically returned roughly 7–10% per year on average over the long run. A "good" ROI is one that beats what you could have earned elsewhere at a comparable level of risk.
What is annualized ROI and why does it matter?
Annualized ROI converts a total return into an equivalent constant yearly rate using compounding, so investments held for different lengths of time can be compared fairly. A 50% total return over one year (50% annualized) is far better than 50% over ten years (about 4% annualized), even though the total ROI is identical.
What is the difference between ROI and ROE?
ROI measures the return on the total money invested in something, while ROE (return on equity) measures the return specifically on shareholders' equity in a company. ROI is the broader, more general-purpose metric; ROE is used to judge how efficiently a business turns its owners' capital into profit.
Does ROI account for inflation and taxes?
No. The ROI figure here is nominal and pre-tax, meaning it does not subtract inflation or the taxes you may owe on gains. To estimate your real, spendable return, subtract the inflation rate over the period and then account for capital gains tax on the profit.
What is the difference between ROI and IRR?
ROI is a simple ratio of profit to cost between two points in time, whereas IRR (internal rate of return) accounts for the exact timing of every cash flow, including interim income and contributions. For a straightforward buy-and-hold investment they are similar, but IRR is more accurate when money moves in or out during the holding period.
Can ROI be negative?
Yes. If the final value is less than the initial investment, the net profit is negative and so is the ROI, indicating a loss. For example, a $10,000 investment that falls to $8,000 has a −20% total ROI.
Sources
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