I hate too say that all those answers are wrong. An 11 year old girl is still growing, obviously. The amount of calories depends on how active the girl is. For example if the girl is a couch potato, she wouldnt be burning off calories playing. But for an active 11 year old girl, she needs fat, calories and nutrients to help her grow and some too burn off playing. Health agencies,departments, scientists and dermatologists have done studies for the average semi-active 9-13 year old girl and they all say around 2,200 calories a day. I say a little less because you get kind of fat eating that much. I think, after all my research, about 1,600-2,000 depending on the girls height, activities and stress.
-Kristina
-Kristina