On this page you can find free information about different types of interest.

Each of the following links takes you to a page where you can watch online videos, view formulas and examples, and learn more about each topic.

The interest is the amount of money paid on borrowed capital. There are two types of interest: simple interest and compound interest.

The simple interest is calculated only on the principal, or on the unpaid part of the principal. Learn how to find the simple interest by watching this interesting video.

The compound interest pays interest on both the principal and the interest already earned. Learn how to find the compound interest and the final balance by watching this video.

To learn how to compare simple and compound interest for the same principal and rate after a certain number of years, watch this informative video.