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ROI Calculator Guide
Measure how well an investment performed. Return on investment (ROI) shows your gain or loss as a percentage of what you put in, and the annualized figure puts investments of different lengths on equal footing.
ROI = (final value − initial investment) ÷ initial investment × 100. Annualized return = (final ÷ initial)^(1/years) − 1.
How Do I Calculate ROI?
Subtract what you invested from what you ended with, divide by the initial investment, and multiply by 100. For example, turning $1,000 into $1,500 is a $500 profit, or a 50% ROI.
Why Annualized Return Matters
A 50% total return sounds the same whether it took one year or ten, but the annual rate is very different. Annualizing lets you compare a quick gain against a slow one fairly. Over 3 years, a 50% total return is about 14.5% per year.
These results are estimates for education and planning, not financial advice. Actual returns, rates, and terms vary — check with a qualified professional before making decisions.
Related: Compound Interest, Retirement, and CD Calculator.
Frequently Asked Questions
What is ROI?
Return on investment is your net gain or loss expressed as a percentage of the amount you originally invested.
How do I calculate ROI?
Subtract the initial investment from the final value, divide by the initial investment, and multiply by 100.
What is a good ROI?
It depends on the investment and risk, but a positive ROI means a gain; comparing the annualized rate to alternatives is more meaningful than the total.
What is annualized return?
The equivalent yearly rate that would produce the same total return over the holding period, useful for comparing investments of different lengths.
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