A Look at Systematic Withdrawals This calculator may help you estimate how long funds may last given regular withdrawals. 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 Lifetime of Earnings Estimate how much you have the potential to earn during your working years. Investments You’ve made investments your whole life. Work with us to help make the most of them. What's New for Social Security? There have been a number of changes to Social Security that may affect you, especially if you are nearing retirement.