Investment ROI Calculator
Find total ROI, net gain or loss, and the annualized return from an initial and final investment value.
Add a holding period to see the annualized return. This tool is for calculation only and is not investment advice.
Enter your initial and final value to see the return.
How to use the ROI calculator
Enter the amount you put in as the initial investment and what it is worth now as the final value. The calculator returns the total ROI as a percentage and the net gain or loss in dollars.
Add a holding period in years to see the annualized return as well. If the final value is below the initial, the ROI and gain show as negative, so the tool handles losses as clearly as gains.
The ROI formula
Return on investment measures the gain relative to the cost. Subtract the initial amount from the final value, divide by the initial amount, and multiply by 100. An investment that grows from $1,000 to $1,500 gains $500, which is a 50% ROI.
Because ROI is a ratio, it lets you compare investments of different sizes. A $500 gain on $1,000 and a $5,000 gain on $10,000 are both a 50% return, even though the dollar amounts differ.
Total versus annualized ROI
Total ROI ignores time. A 50% total return looks the same whether it took one year or ten, yet those are very different outcomes. Annualized ROI fixes this by spreading the growth evenly across the years held.
It is the steady yearly rate that would turn the initial amount into the final one. A 50% total return over two years works out to about 22.47% a year, because the growth compounds. Use the annualized figure to compare investments held for different lengths of time.
What ROI does not tell you
ROI is a single backward-looking number. It says nothing about risk, how steady the returns were, or whether the result was luck. Two investments with the same ROI can carry very different chances of loss.
Total ROI also leaves out time unless you annualize it, and neither version accounts for fees, taxes, or inflation. Treat the figure as one input among many, not a verdict. This tool performs a calculation and is not investment advice.
Frequently asked questions
- How do I calculate ROI?
- Subtract the initial investment from the final value, divide by the initial investment, and multiply by 100. Growing $1,000 into $1,500 is a $500 gain, or a 50% ROI. The calculator does this for you.
- What is annualized ROI?
- Annualized ROI is the steady yearly rate that grows the initial amount into the final one over the holding period. A 50% total return over two years is about 22.47% a year, because the growth compounds.
- Why is annualized ROI lower than total ROI?
- Because the annual figure compounds over the years held. A 50% total return spread over two years is roughly 22.47% each year, since gaining 22.47% twice in a row multiplies up to about 50%.
- Can ROI be negative?
- Yes. If the final value is below what you invested, the ROI and net result are negative, showing a loss. The calculator displays losses with a minus sign and the dollar amount lost.
- Does ROI account for risk or fees?
- No. ROI is a simple measure of gain against cost. It ignores risk, the steadiness of returns, fees, taxes, and inflation. Use it alongside other measures, not on its own, and treat it as information rather than advice.