My Retirement Savings Estimate how long your retirement savings may last using various monthly cash flow rates. 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 Question Thank you! Oops! Related Content The Power of Compound Interest Learn how to harness the power of compound interest for your investments. Deciding When to Take Social Security One of the most common questions people ask about Social Security is when they should start taking benefits. 9 Facts About Social Security There are things about Social Security that might surprise you.