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 Question Thank you! Oops! Related Content Password Protection Strategies Simple steps may help you foil hackers and protect your privacy. Put It in a Letter A letter of instruction provides additional and more personal information regarding your estate. What's My Potential Estate Tax? This calculator helps estimate your federal estate tax liability.