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. Share | Have A Question About This Topic? Name Email Address Message Thank you! Oops! Related Content Don't Buy The Hype There are a lot of misconceptions about Social Security. Here’s the truth about three of them. Social Security Benefits: How Much Will I Receive Calculating your potential Social Security benefit is a three-step process. A Look at Systematic Withdrawals This calculator may help you estimate how long funds may last given regular withdrawals.