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 How to Bake a Pie-R-A Roth IRAs are tax-advantaged differently from traditional IRAs. Do you know how? Comparing Investments This calculator compares the net gain of a taxable investment versus a tax-favored one. Federal Income Tax Use this calculator to estimate your income tax liability along with average and marginal tax rates.