DocomintCalculatrice de ROI
Calculez le retour sur investissement (ROI) à partir du coût et de la valeur actuelle d'un investissement.
What is a Calculatrice de ROI?
ROI condenses any investment's performance into one comparable percentage — the gain or loss relative to what was put in — useful for comparing wildly different investments (stocks, a side business, home renovations) on the same scale, though it deliberately ignores the time it took to get there, which is what annualized return metrics are for.
How to use the Calculatrice de ROI
- Enter the investment's cost and its current (or exit) value
- Press Calculate
- The gain/loss and ROI percentage appear instantly, calculated on your device
Formula
ROI = (Current Value − Investment Cost) ÷ Investment Cost × 100
A simple, time-agnostic percentage — it measures total gain or loss relative to what was originally invested, without factoring in how long that took.
Example
A $5,000 investment now worth $6,250 has an ROI of 25% ($1,250 gain ÷ $5,000 cost) — the same 25% ROI could come from doubling your money in a month or over a decade, which is why ROI alone doesn't tell the whole story without a timeframe attached.
Common mistakes
- Comparing ROI across investments with very different timeframes without annualizing — a 25% ROI over one month is not comparable to 25% over ten years.
- Leaving fees, taxes, or maintenance costs out of the investment cost figure, which overstates the real ROI.
- Reading a negative ROI as a percentage of current value rather than of the original cost — it's always relative to what was put in.
Frequently asked questions
What counts as a good ROI?
It depends heavily on the investment type and timeframe — a 25% ROI over one month is exceptional, but the same 25% over 10 years is mediocre. There's no universal "good" number without also knowing how long it took to achieve.
Does ROI account for how long the investment took?
No — plain ROI is time-agnostic by design, which makes it easy to compare across investment types but means two investments with identical ROI can have very different actual performance once you factor in how many years each took.
How do I annualize ROI to compare investments of different lengths?
Divide the holding period into the total ROI using the compound annual growth rate formula, roughly (1 + ROI)^(1/years) − 1, rather than comparing raw ROI figures across different timeframes directly.
Should I include dividends or income in current value?
Yes, if you want total return rather than just price appreciation — add any dividends, interest, or other income received to the current value figure so the ROI reflects the investment's full performance.
Is my numbers uploaded anywhere?
No — Calculatrice de ROI runs entirely in your browser using JavaScript/WebAssembly. Your numbers is never sent to a server.