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 Financially Savvy at Six Figures Help your clients with these practical steps to make the most of their six-figure income. Federal Income Tax Use this calculator to estimate your income tax liability along with average and marginal tax rates. Systematic Withdrawals in Retirement Taking regular, periodic withdrawals during retirement can be quite problematic.