Calories provide energy, which we need to survive and perform daily activities. The calories we get from food and beverages allow us to breathe, walk, run, laugh and even pump blood. Calorie needs vary depending on age, sex, height and activity level. Calorie needs are often higher during the teenage years than any other time of life. how many calories you burn daily depends on your sex, age, and activity level. We look at how many calories are needed to maintain weight or to lose weight. Use the calorie calculator to estimate the number of daily calories your body needs to maintain your current weight. Therefore, it is very important to understand the teen nutritional need and calorie intake. In the growing process body requires high amount of nutrients. Nutrients are present in food one eats and it includes vitamins, minerals, fats, proteins and calories. Most teens consume just a little more than 2 cups of dairy products daily, compared with the recommended 3 cups per day. Most of the average teens diet comes from added sugars and fats, which account for nearly 900 calories per day. Just as a teenage girl consuming too many calories is detrimental to her health -- according to the u. Use our calorie-intake calculator to determine your daily caloric needs based on your height, weight, age and activity level. In addition to determining the calories needed to maintain weight, use this as a calorie burner calculator and figure out how many calories you need to burn in order to drop pounds.