How many calories should a 13 year old boy eat per day?
It varies a little based on weight, height, activity level, and a few other factors, but on average about 1,200 to 1,400 calories a day.
An 11-year-old girl who leads a sedentary life is advised to consume approximately 1,600 calories per day. A much more active 11-year-old girl should consume 2,200 calories daily. An inactive boy of the same age should consume about 1,800 calories per day, while an active 11-year-old boy should consume 2,600 calories per day.