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. Related Content RE: Retirement How does your ideal retirement differ from reality, and what can we do to better align the two? Emotional vs. Strategic Decisions Information vs. instinct. Are your choices based on evidence of emotion? Disability Income This calculator estimates your chances of becoming disabled and your potential need for disability insurance.