Doubling Your Money This calculator demonstrates the power of compound interest. You are viewing this website at a small screen resolution which doesn't support calculators. Click here to view this calculator. Share | Have A Question About This Topic? Address Thank you! Oops! Related Contents The Cost of Procrastination Procrastination can be costly. When you get a late start, it may be difficult to make up for lost time. What to Look for in Personal Finance Apps An increasing number have been developed to help individuals with their personal finances. Paying Off a Credit Card Enter various payment options and determine how long it may take to pay off a credit card.