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 Taxable vs. Tax-Deferred Savings Use this calculator to compare the future value of investments with different tax consequences. When Should You Take Social Security Monthly Social Security payments differ substantially depending on when you start receiving benefits. How Income Taxes Work A quick look at how federal income taxes work.