My Retirement Savings Estimate how long your retirement savings may last using various monthly cash flow rates. 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 Four Really Good Reasons to Invest There are four very good reasons to start investing. Do you know what they are? Volunteering in Retirement For many, retirement includes contributing their time and talents to an organization in need. Should I Pay Off Debt or Invest? This calculator will help determine whether you should invest funds or pay down debt.