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! Want to be Smarter With Your Money? Join our mailing list and get news and info to support your financial goals. First Name Last Name Email Address Thank you! Oops! Related Contents The Latte Lie and Other Myths Do you know these three personal finance sayings? Data Thieves from Outer Space Learn about the dangers of internet fraud with this highly educational and fun “pulp” comic. Historical Inflation This calculator shows how inflation over the years has impacted purchasing power.