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? Name Email Address Question Thank you! Oops! Test Your Investment Knowledge! How much do you know about investing? Take our quiz and find out instantly. First Name Last Name Email Address Thank you! Oops! Related Contents Once Upon a Goal Do you know how to set up your financial goals for success? This knight does. The Lowdown on Those Free Credit Scores What’s the deal with your yearly free credit report? Your Cash Flow Statement A presentation about managing money: using it, saving it, and even getting credit.