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. Related Content The Pre-Retirement Checklist This checklist can give you a quick snapshot of how prepared you are. Critical Estate Documents Sound estate management includes creating financial and healthcare documents. Here's an inside look. A Taxing Story: Capital Gains and Losses Understanding how capital gains are taxed may help you refine your investment strategies.