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 The Cost of Procrastination Procrastination can be costly. When you get a late start, it may be difficult to make up for lost time. The Lowdown on Those Free Credit Scores What’s the deal with your yearly free credit report? Historical Inflation This calculator shows how inflation over the years has impacted purchasing power.