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 Tuning Your Social Security Benefit When should you take your Social Security benefit? Estimating the Cost of College This worksheet can help you estimate the costs of a four-year college program. Lifetime of Earnings Estimate how much you have the potential to earn during your working years.