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 Weighing the Benefits of Prepaid Debit Cards It's important to understand the pros and cons when considering a prepaid debit card. My Retirement Savings Estimate how long your retirement savings may last using various monthly cash flow rates. Countdown to College Preparing for college means setting goals, staying focused, and tackling a few key milestones along the way.