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 Interested in a Fuel Efficient Car? Estimate how many months it may take to recover the out-of-pocket costs when buying a more efficient vehicle. Taxable vs. Tax-Deferred Savings Use this calculator to compare the future value of investments with different tax consequences. Should I Buy or Lease an Auto? This calculator compares the financial impact of leasing versus buying an automobile.