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? Address Thank you! Oops! Free Guide: Will Tax Reform Impact You? The new tax laws in 2018 could bring significant changes to your tax strategy. Download our free ebook, "5 Things You Need to Know About Tax Reform." First Name Last Name Email Address Thank you! Oops! Related Contents Saving for College 101 Here’s a crash course on saving for college. 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.