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 What Our Kids Can Teach us About Saving Money Would you guess that Millennials are effectively saving for retirement? Well, they are. Pay Yourself First It sounds simple, but paying yourself first can really pay off. Historical Inflation This calculator shows how inflation over the years has impacted purchasing power.