Like previous posters have said, Calorie King is a fantastic site.

Also, check out a book called "The Body Sculpting Bible for Women". No, it's not going to make you bodybuilding-muscly!!! But it's an excellent book which outlines which exercises (cardio and weights) you should do and gives you sample meal plans with the amount of calories. I've pulled it out of my bookshelf again as I need to lose 8kg myself.