Well, trying to calculate how much you should eat to lose weight with online calculators, or your height/age/weight isn't always too accurate. I recommend the trial and error method. You can have two people of the same age, height, and weight, and they can have different metabolisms.
Check out the FAQ Sticky in the Calorie Counters section (under the Diet Central area, just like this section) and read. It gives more information.
