How much should I save to reach my goal?

What are you saving for: a computer, car, boat, summer home, down payment? Use this calculator to determine what you need to save on a regular basis to have the funds ready when needed.
Savings
Current savings balance ($) 
Future amount desired ($) 
Number of years until needed 
Annual increase on recommended savings (%) 
Assumptions
Before-tax return on savings (%)help
Marginal tax bracket * (%)help