Calorie Calculator for Kids & Teens
A parent-facing reference for how many calories children and teenagers typically need to grow and thrive, by age, sex, and activity, drawn from published national guidelines.
For parents and caregivers. This is an educational reference for supporting healthy growth, not a weight-loss or diet tool for children. Never put a child or teen on a calorie-restricted diet without direct guidance from a pediatrician. If you have concerns about your child's weight or eating, speak with their doctor.
Child's details
Published reference range for healthy growth. This is a guide for parents, not a target to restrict a child to.
Where these numbers come from
The figures are the estimated calorie needs for children and adolescents in the USDA Dietary Guidelines for Americans, based on age, sex, and activity. Growing bodies also have real needs for protein, calcium, iron, and healthy fats, so food quality matters as much as the calorie figure. A pediatrician or dietitian can tailor this to your child.
Children are not small adults, and the resting-metabolism formulas used for grown-ups are not validated for them. Instead, this page uses the estimated calorie needs published in the USDA Dietary Guidelines for Americans, which are based on the age, sex, and activity level of healthy, growing children and teens. The goal is to help parents understand roughly how much fuel a growing body needs, never to restrict a child's intake.
Growth comes first, not calorie targets
For most children, the right approach is regular, balanced meals and snacks, letting the child decide how much to eat within what you provide. Kids are generally good at self-regulating hunger when offered nutritious food on a predictable schedule. The numbers on this page describe typical needs, not a quota to enforce at every meal.
Growth is rapid and uneven. Appetite naturally surges before growth spurts and quiets afterward. Rather than watching calories, pediatricians track growth charts over time, which show whether a child is following a healthy trajectory for their own pattern.
What growing bodies need beyond calories
Children and teens need enough protein to build muscle and organs, calcium and vitamin D for developing bones, iron for blood and brain development, and healthy fats for the nervous system. Teenagers, especially during the adolescent growth spurt, can have surprisingly high energy needs, active teen boys may need 3,000 calories or more a day.
Because of these demands, food quality matters even more than the calorie figure. Whole grains, fruits, vegetables, dairy or fortified alternatives, and lean proteins should make up the bulk of the plate, with sugary drinks and ultra-processed snacks kept occasional.
When to talk to a pediatrician
Reach out to your child's doctor if you are worried about their weight in either direction, if they are a very picky eater, if growth seems to have stalled or accelerated unusually, or if you are considering any change to their diet. A pediatrician or pediatric dietitian can assess growth charts, development, and nutrition together and give safe, individualized advice.
For teens showing signs of disordered eating, such as skipping meals, obsessive calorie counting, or extreme exercise, seek professional help promptly rather than using any online calculator.
Frequently Asked Questions
It depends heavily on age, sex, and activity. Younger children (ages 2 to 4) often need around 1,000 to 1,600 calories, school-age children roughly 1,400 to 2,200, and active teenagers 2,400 to 3,200 or more. Use the reference above for a specific age, and treat it as a typical range, not a strict target.
For most families, no. Pediatricians recommend offering balanced, regular meals and letting children respond to their own hunger and fullness, while tracking growth over time rather than daily calories. Calorie counting for children is only appropriate under direct medical supervision.
Teens have high needs during growth. Active teen boys may need about 2,800 to 3,200 calories a day and active teen girls about 2,200 to 2,400, with less-active teens needing several hundred fewer. Needs peak during the adolescent growth spurt.
Do not start a restrictive diet on your own. For growing children, doctors often focus on maintaining weight while the child grows into it, plus more activity and better food quality, rather than cutting calories. Talk to your pediatrician for a safe, individualized plan.
Adult equations like Mifflin-St Jeor were developed and validated for people 18 and older and do not account for the energy cost of growth. National dietary guidelines publish separate estimates for children and teens, which is what this reference uses.
A variety of whole foods: fruits and vegetables, whole grains, lean proteins, and dairy or fortified alternatives, with adequate protein, calcium, iron, and healthy fats. Limit sugary drinks and ultra-processed snacks. Quality and regular meals matter more than hitting an exact calorie number.
Important: This page is a general educational reference for parents and caregivers, not medical advice and not a weight-management or dieting tool for minors. Children and teens have unique nutritional needs for growth. Do not restrict a child's calories without direct supervision from a pediatrician or pediatric dietitian, and consult them with any concern about your child's weight, growth, or eating behavior.