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 Put It in a Letter A letter of instruction provides additional and more personal information regarding your estate. When Special Care Is Needed: The Special Needs Trust A special needs trust helps care for a special needs child when you’re gone. Managing the Risk of Outliving Your Money Steps to help you sustain and grow your retirement savings.