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 | Related Content The Power of Compound Interest Learn how to harness the power of compound interest for your investments. How Does Your Credit Score Compare? Have you ever wondered how your credit score compares to the rest of the country? Take a look and see. What Is My Current Cash Flow? Assess whether you are running “in the black” or “in the red” each month.