Business
ROI calculator
Measure a gain or loss as a percentage of the original amount invested.
ROI compares the net gain or loss with the original amount invested. It does not account for time.
Return on investment
35%
$350.00 net gain.
ROI alone does not measure risk, taxes, fees, inflation, or how long the investment was held.
Plain-language method
Compare the net result with the starting investment.
Subtract the amount invested from the final value to find the net gain or loss. Divide that result by the original investment to express it as a percentage.
ROI is useful for a quick comparison, but it does not account for time. Two investments with the same ROI can perform very differently if one takes much longer.
Results update instantly and stay on your device. Review the assumptions above before using an estimate for a financial decision.