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 Saving for College 101 Here’s a crash course on saving for college. U.S. Personal Savings Rate What can be learned from the savings rate? Historical Inflation This calculator shows how inflation over the years has impacted purchasing power.