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 Bi-Weekly Payments This calculator estimates the savings from paying a mortgage bi-weekly instead of monthly. Social Security Taxes Estimate how much of your Social Security benefit may be considered taxable. Mortgages in Retirement Explore the benefits and drawbacks to paying off your mortgage prior to retirement with this article.