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! Related Contents Saving for College 101 Here’s a crash course on saving for college. Data Thieves from Outer Space Learn about the dangers of internet fraud with this highly educational and fun “pulp” comic. What Is My Current Cash Flow? Assess whether you are running “in the black” or “in the red” each month.