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 The Latte Lie and Other Myths Do you know these three personal finance sayings? Password Protection Strategies Simple steps may help you foil hackers and protect your privacy. Historical Inflation This calculator shows how inflation over the years has impacted purchasing power.