How Compound Interest Works Use this calculator to better see the potential impact of compound interest on an asset. You are viewing this website at a small screen resolution which doesn't support calculators. Click here to view this calculator. Have A Question About This Topic? Name Email Address Message Thank you! Oops! Related Content When Do You Need a Will? When do you need a will? The answer is easy: Right Now. Test Your Life Insurance Knowledge How much do you know about one of the most important tools you have to help protect your and your family’s financial future? Estate Management 101 A will may be only one of the documents you need—and one factor to consider—when it comes to managing your estate.