Compound interest can work to your advantage as your investments grow over time, but against you if you're paying off debt, like credit cards. A calculator can help predict how much money compound ...

Watch your money grow—or calculate how much money you will owe in total—with the MoneySense compound interest calculator. Here’s how it works.

To use the compound interest calculator, enter the following information and select Calculate. Initial deposit. How much will you deposit when you open the account?

Compound interest is often used in calculating returns on savings accounts, FDs, RDs, as well as bonds, and mutual funds. Here’s how you can calculate it.

One of the easiest ways to calculate how compound interest will grow your funds is to estimate it using the Rule of 72. Divide 72 by the annual interest rate, or APY, offered.