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 My Retirement Savings Estimate how long your retirement savings may last using various monthly cash flow rates. Do Our Biases Affect Our Financial Choices? Even the most seasoned investors have biases affecting their financial choices. A Look at Diversification Diversification is an investment principle designed to manage risk, but it can't prevent against a loss.