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? Global vs. International: What’s the Difference? International funds invest in non-U.S. markets, while global funds may invest in U.S. stocks alongside non-U.S. stocks. A Fruitful Retirement: Social Security Benefit Taking your Social Security benefits at the right time may help maximize your benefit.