How Compound Interest Works Use this calculator to better see the potential impact of compound interest on an asset. You are viewing this website at a small screen resolution which doesn't support calculators. Click here to view this calculator. Have A Question About This Topic? Name Email Address Message Thank you! Oops! Related Content Data Thieves from Outer Space Learn about the dangers of internet fraud with this highly educational and fun “pulp” comic. 18 Years’ Worth of Days The average retirement lasts for 18 years, with many lasting even longer. Will you fill your post-retirement days with purpose? To Buy or Not to Buy The decision whether to buy or rent a home may have long-term implications.