Enter the total interest earned ($) and the total investment amount ($) into the Return on Interest Calculator. The calculator will evaluate and display the Return on Interest.

## Return on Interest Formula

The following formula is used to calculate the Return on Interest.

ROIn = IE / IA * 100

• Where ROIn is the Return on Interest (%)
• IE is the total interest earned ($) • IA is the total investment amount ($)

## How to Calculate Return on Interest?

The following example problems outline how to calculate Return on Interest.

Example Problem #1:

1. First, determine the total interest earned ($). • The total interest earned ($) is given as: 3,000.
2. Next, determine the total investment amount ($). • The total investment amount ($) is provided as: 10,000.
3. Finally, calculate the Return on Interest using the equation above:

ROIn = IE / IA * 100

The values given above are inserted into the equation below and the solution is calculated:

ROIn = 3,000 / 10,000 * 100 = 30.00 (%)

Example Problem #2:

For this problem, the variables needed are provided below:

total interest earned ($) = 6,000 total investment amount ($) = 30,000

This example problem is a test of your knowledge on the subject. Use the calculator above to check your answer.

ROIn = IE / IA * 100 = ?