Question: how many calories should a 15 year old lose a day?
Answer: Daily Caloric Needs by Age 6 to 8 years old: 1,600 calories per day. 9 and 10 years old: 1,800 calories per day. 11 years old to 13 years old: 2,200 calories per day. 14 to 17 years old: 2,400 to 2,800 per day.