The Ballpark E$timate is an easy-to-use, two-page worksheet that helps you quickly identify approximately how much you need to save to fund a comfortable retirement. The Ballpark E$timate takes complicated issues like projected Social Security benefits and earnings assumptions on savings, and turns them into language and mathematics that are easy to understand. The Ballpark E$timate is available as both a worksheet and online interactive form.

Worksheet: http://www.choosetosave.org/ballpark/

Interactive Form: http://www.choosetosave.org/ballpark/index.cfm?fa=interactive