If she is very overweight/underweight she should see a doctor and nutritionist, she is too young for an 'adult' diet. But if she is normal weight don't worry about her calories, just give her a healthy well balanced diet and her appetite will take care of the rest.
For examples of the daily calorie requirements of a 7-year-old girl or boy, see the page link, further down this page, listed under Related Questions.
1500 calories
about 1000 - 1100 calories
A 11 year old girl should have 3,880 calories a day.
2,000
A 10 year old girl should consume 1,000 calories a day!
About 1,300 calories a day.
a teenage girl should take in 1,400 calories a day and 1,200 if on a diet!
About 1,000 calories a day.
About 1,500 to 2,000 calories a day.
About 1882 calories a day
2,000 calories!!
About 2000- 2500 calories About 2000- 2500 calories.