ROI Calculator — return on investment
Calculate return on investment, net profit and annualized return from initial and final values — in your browser.
🔒 Runs entirely in your browser. Your input and output are never sent to a server or stored — fully private.
For estimation only — not financial advice.
About this tool
This ROI calculator measures how well an investment paid off by comparing what you put in with what you got back. Enter the initial amount and the final value and it returns the net profit, the return on investment as a percentage, and — if you add how long you held the investment — the annualized return, which lets you compare deals of different lengths on equal footing. It suits sizing up a stock, a property, a side project or a marketing spend. All the math is done in your browser, so your figures never leave your device.
Frequently asked questions
How is ROI calculated?
Return on investment is the net profit divided by the initial amount, shown as a percentage: ROI = (final value − initial amount) ÷ initial amount × 100. So an investment that grows from 1,000 to 1,250 has a net profit of 250 and an ROI of 25 percent. A negative result simply means the final value came in below what you put in — that is, a loss.
What does annualized return mean?
Annualized return restates your total ROI as an equivalent steady rate per year, so a long, slow gain and a quick one can be compared fairly. It uses compounding: annualized = (final ÷ initial)^(1 ÷ years) − 1. A 25 percent total return over five years is only about 4.6 percent a year, while the same 25 percent in one year is 25 percent annualized. Add the holding period to see this figure; without it, only the plain total ROI is shown.
Does ROI count fees, taxes or inflation?
Only if you build them into the numbers you enter. Basic ROI compares two values and ignores trading fees, taxes on gains and the effect of inflation, all of which reduce what you actually keep. For a truer picture, subtract costs and taxes from the final value before entering it. Treat the result as an educational estimate for comparison, not financial advice, and your figures stay in your browser and are never uploaded.