Simple Interest Rate Calculator

After entering the required information in the calculator below, click the calculate button.

Below this page, you can also find the answers for frequently asked questions about this subject.
Simple Interest Rate Calculator
* Required fields.
  1. e.g 30
  2. e.g 12.75

What is compound interest?

It is the rate that shows the return obtained as a result of the reinvestment of the profit earned by the principal during the investment period by adding to the principal. In other words, it is the return on profit.

What is simple interest?

It is the rate of profit earned by the principal only during the investment period.

How is simple interest calculated?

Calculated by the following formula.

[(Compound Interest Rate / 100 + 1) number of days / 365 - 1] x 36500 / number of days

Example:
13 December 2025 term bond
Today: 1 March 2025
Days to Maturity: 287 days
Compound Interest Rate: 75.12%
Simple Interest Rate = [(75.12 / 100 + 1)287 / 365 - 1] x 36500 / 287 = 70.40