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 How Stocks Work Understanding how a stock works is key to understanding your investments. My Retirement Savings Estimate how long your retirement savings may last using various monthly cash flow rates. Strategies for Managing Student Loan Debt Five strategies for managing your student debt.