How much calories should my 13 year old child need to eat to maintain his weight?(boy) he weighs 113 and he is 5'3.

Calories: A teenage boy needs 2200-3200 calories per day depending on how active he is and at what stage of development he is. He should be eating a balanced diet and not getting the majority if those calories from junk food and fast food. A growing child needs plenty of calcium and vitamin d, so if he isn't getting enough dairy, have him take 1-2 calcium supplement(s).