It depends on height, weight metabolism, activity...there is no way we can tell you without knowing more.
However, if you put all your numbers into FitDay, it should do those calculations for you.
Rule of thumb is that you have to burn 3500 more calories than you eat to lose one pound.
"If you drop an egg, you don't say, 'Oh, shoot' and drop the other 11, do you?"
-Source unknown, but obviously brilliant
Reached goal 4/16/2010...but kind of afraid to look these days