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 Message Thank you! Oops! Related Content Capital Gains Tax Estimator Use this calculator to estimate your capital gains tax. A Fruitful Retirement: Social Security Benefit Taking your Social Security benefits at the right time may help maximize your benefit. What is the Value of Your Business? Ascertaining the value of your business is important for a variety of reasons.