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 Surprise! You’ve Got Money! Here’s a quick guide to checking to see if you have unclaimed money. Making Sense of U.S. Household Net Worth A look inside the U.S. government's statistics on household net worth. What Is My Current Cash Flow? Assess whether you are running “in the black” or “in the red” each month.