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. The Half Million Dollar Baby The true cost of raising a child may be far more than you expect. The Long Run: Women and Retirement For women, retirement strategy is a long race. It’s helpful to know the route.