What return on investment (ROI) means
Return on investment is the single most common way to express how well an investment performed relative to its cost. It answers a simple question: for every unit of money you put in, how much did you get back? Because ROI is expressed as a percentage, it lets you compare very different things on the same scale — a stock purchase, a rental property, a marketing campaign, or a small business project — even when the amounts and time frames differ. That comparability is exactly why investors, marketers and finance teams reach for it first.
The basic formula is straightforward: ROI = (final value − amount invested) ÷ amount invested × 100. If you invested 10,000 and it is now worth 13,500, your net profit is 3,500 and your ROI is 35%. This calculator does that arithmetic for you and, when you supply a holding period, goes one step further to show your annualized return.
Why annualized return (CAGR) matters more
Plain ROI hides time. A 35% return is excellent over one year but mediocre over ten. The compound annual growth rate (CAGR) fixes this by converting your total return into the equivalent steady yearly rate, using CAGR = (final ÷ invested)^(1 ÷ years) − 1. That 35% over three years works out to roughly 10.5% per year — a far more honest number for comparing investments held for different lengths of time. Whenever you are weighing two opportunities, compare their annualized returns, not their headline totals.
How to use this calculator
- Enter the amount invested — your total cost, including purchase price and any upfront fees you want to factor in.
- Enter the final or current value — what the investment is worth today or what you sold it for.
- Optionally add the holding period in years to unlock the annualized (CAGR) figure. You can use decimals, e.g. 1.5 for eighteen months.
- Pick your currency for display, then press Calculate ROI.
- Read the three tiles: total ROI, net profit, and annualized return. Green means a gain, red means a loss.
What ROI does not capture
- Risk. Two investments with the same ROI can carry wildly different risk. ROI alone never tells you how much you could have lost.
- Taxes and fees. Real returns are reduced by capital gains tax, trading commissions and management fees. Enter net figures if you want an after-cost view.
- Inflation. A 5% return when inflation is 6% is a real loss of purchasing power.
- Cash flows. For investments with regular contributions or dividends, a money-weighted measure such as IRR is more accurate than simple ROI.
Frequently asked questions
Can ROI be negative?
Yes. If the final value is lower than the amount invested, ROI is negative, which means a loss. For example, investing 10,000 that is now worth 8,000 gives an ROI of −20%.
Should I use ROI or CAGR to compare investments?
Use CAGR (annualized return) whenever the holding periods differ. Plain ROI is fine for a quick gross comparison over the same time frame, but CAGR is the fairer measure across different durations.
Does this include compounding or reinvested dividends?
The CAGR figure reflects compounding of the price change, but it does not separately add reinvested dividends or interest. To include them, add their value to the final amount before calculating.
Is my data saved?
No. Every figure stays in your browser and the calculation runs locally in JavaScript. Nothing is uploaded or stored.