How many calories should a averaged sized teenager be taking in?

Large Range: Calorie requirements for teenagers can have a very large range, from 1, 500 to 3, 000+ per day, depending on activity level and other factors. The amount a person needs to consume is based on their sex, current weight, whether they are trying to gain, lose or maintain weight and how much exercise & activity they do. Talk with your child's pediatrician for specifics.

Wide range: There is a wide range of calorie needs from 1800 calories to over 3000 a day depending on age, level of maturity, activity and rate of growth. If near maturity and average activity, then adult values can be generally recommended. Body Mass Index can be calculated from charts or from your pediatrician. An intake of 100 calories a day over body needs will result in about 10 pound weight gain/yr.