What Is My Life Expectancy? Estimate how many years you may need retirement assets or how long to provide income to a surviving spouse or children. 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 Question Thank you! Oops! Related Content How Stocks Work Understanding how a stock works is key to understanding your investments. Estate Management 101 A will may be only one of the documents you need—and one factor to consider—when it comes to managing your estate. Retiring the 4% Rule A portfolio created with your long-term objectives in mind is crucial as you pursue your dream retirement.