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 Message Thank you! Oops! Related Content 3 Estate Challenges for Blended Families This article will help your clients with blended families think and prepare their estate strategy. Life and Death of a Twenty Dollar Bill How long does a $20 bill last? Financial Aid for Students 101 Help your college-bound child explore scholarships, grants, and more with this article on paying for higher education.