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 Saving for College 101 Here’s a crash course on saving for college. Making Sense of U.S. Household Net Worth A look inside the U.S. government's statistics on household net worth. Your Cash Flow Statement A presentation about managing money: using it, saving it, and even getting credit.