A 10-year-old girl should consume 1,600 to 2,200 calories per day. According to the American Academy of Family Physicians, a sedentary girl needs roughly 1,600 calories per day, while a moderately active girl can consume up to 2,000 calories daily. An active girl needs 1,800 to 2,200 calories.
According to About.com, a child's basic calorie requirement is her body's energy allowance for performing basic tasks, such as walking and breathing. Although the precise required intake varies according to how quickly her body uses energy, caloric intake guidelines provide a baseline for maintaining a healthy weight. The more a girl uses energy, usually through exercise, the more calories she can consume and remain healthy.