TDEE Calculator for Teenagers
Caloric needs are higher during growth — don't make the mistake of eating too little
Why do teenagers have different caloric needs?
Adolescence (12-18 years) is the period of greatest human growth. The body needs extra energy for muscle and bone development, hormonal maturation and height growth. An active teenager may need 2,800-3,500 kcal/day. Caloric restriction can compromise growth, bone density and hormonal development. Protein is especially critical: 1.3-1.6 g/kg/day for normal growth and 1.5-2.0 g/kg/day for athletes.
How to use this calculator for teenagers
Enter the actual age, current weight and height, and an honest activity level. The result is a maintenance TDEE — in healthy growing teenagers, a caloric deficit is NOT recommended. If there is overweight, consult a pediatrician or specialist nutritionist.
Estimated TDEE for teenagers by age and activity
| Age / Sex | Sedentary | Moderate | Very Active |
|---|---|---|---|
| 12-14 (boy) | ~2,000 kcal | ~2,400 kcal | ~2,900 kcal |
| 12-14 (girl) | ~1,750 kcal | ~2,100 kcal | ~2,500 kcal |
| 15-17 (boy) | ~2,200 kcal | ~2,700 kcal | ~3,200 kcal |
| 15-17 (girl) | ~1,850 kcal | ~2,200 kcal | ~2,600 kcal |
FAQ
1Can teenagers diet to lose weight?
Only with medical or specialist nutritionist supervision. Caloric restriction can compromise growth, bone mass and hormonal balance in under-18s.
2Is it normal for teenagers to be very hungry?
Absolutely. Accelerated growth and hormonal activity spike caloric needs. An active teenager who is constantly hungry is responding to real bodily needs.
3Can teenagers lift weights?
Yes, with proper supervision. Strength training is safe and beneficial: improves bone density and body composition. The myth that it 'stunts growth' has no scientific basis.
4What micronutrients are key in adolescence?
Calcium (1,200-1,300 mg/day for bone peak mass), iron (especially girls: 15 mg/day), Vitamin D (600-1,000 IU/day), zinc for growth and sexual maturation.