ROI is Rate of Investment. It is a ratio between the net gain and the net cost of an investment. It is also known as ROR (rateofreturn), this calculator allow you to compare the results of different investments over different time duration. ROI is the rate of return you expect which is annually compounded from your investments before all taxes.
Input  Description 

Amount Invested  It is an amount which you want to invest (Initial value) 
Amount Returned  It is a final amount which you will have after investing 
Time Duration  The duration in years for which you want to invest 
Output  Description 

Total Investment  Total amount have have invested 
Total gain  Total interest earned after investment 
Annual rate of interest  It is a percentage rate of return which you can get after investment 
To calculate ROI, difference of the gain (or return) from an investment and cost of the investment is divided by the cost of the investment. The result is known as a percentage or a ratio of return.
ROI = 

ROI = 

× 100% 