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 Message Thank you! Oops! Related Content The Power of Compound Interest Learn how to harness the power of compound interest for your investments. U.S. Personal Savings Rate What can be learned from the savings rate? What Is My Current Cash Flow? Assess whether you are running “in the black” or “in the red” each month.