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 The Rule of 72 Do you know how long it may take for your investments to double in value? The Rule of 72 is a quick way to figure it out. Succeeding at Business Succession There are a number of reasons for business owners to consider a business succession plan sooner rather than later. Getting a Head Start on College Savings A few strategies that may help you prepare for the cost of higher education.