Parents often wonder: Is my child eating enough? Or too much? Children's calorie needs differ sharply from adult needs — they are higher per kilogram of body weight, because growth, brain development and movement burn through energy.
The Estimated Energy Requirement (EER) from the U.S. Institute of Medicine is the pediatric standard. It accounts for age, sex, height, weight and an age-appropriate activity level — giving a realistic daily number instead of crude rules of thumb.
Why children need more calories per kg
A 6-year-old child weighing 22 kg needs about 1500 kcal — roughly 68 kcal per kg. An 80 kg adult with a desk job manages on about 30 kcal/kg. The reason: growth builds new tissue, the brain develops rapidly, and children move much more in everyday life — even "calm" children are more active than most adults.
That is also why the old "body weight × 30" rule of thumb is wildly wrong for children. Their needs depend mostly on age — and on activity level.
Reference values by age and sex (kcal/day)
| Age | Boy (moderate) | Girl (moderate) | Active (extra) |
|---|---|---|---|
| 1–3 years | 1000–1200 | 950–1150 | +100–200 |
| 4–8 years | 1400–1600 | 1300–1500 | +200–400 |
| 9–13 years | 1800–2200 | 1600–2000 | +400–600 |
| 14–18 years | 2400–2800 | 1800–2200 | +400–800 |
These values are averages across the age range. Within a band they vary with size and growth speed. The exact number comes from the calculator.
The four activity levels — what they mean
- Sedentary — school, homework, screen. Little planned movement. PA factor 1.00.
- Low active — typical school day with walking, outdoor play, occasional PE. PA 1.13 (boy) / 1.16 (girl).
- Active — regular club training (2–4×/week), active lifestyle. PA 1.26 / 1.31.
- Very active — competitive sport, multiple hours of daily training. PA 1.42 / 1.56.
Puberty growth spurt: needs explode
Between ages 10 and 16, energy needs rise in surges. Growth hormones spike, bones lengthen, muscles develop. A 14-year-old boy in sport may need 3000 kcal or more during this phase — temporarily more than many adults.
Parents notice this fast: suddenly the entire fridge disappears, portions become huge. This is normal — and ends once linear growth completes (girls usually 14–16, boys 16–18).
What matters more than the number
- Hunger and fullness cues — children regulate appetite well. Forced clean plates or strict portions interfere with self-regulation.
- Food quality — whole grains, vegetables, protein, healthy fats. A 1500-kcal pizza diet is not the same as 1500 kcal of balanced food.
- Growth curve — more important than daily calories. If height and weight stay on a stable percentile, the intake fits.
- Meal rhythm — 3 main meals + 1–2 snacks. Children need refueling more often than adults.
Related topics & calculators
- TDEE (adults) — adult calorie needs using the Mifflin-St Jeor formula. Read the TDEE article.
- Child growth percentile — where does your child sit compared to the norm? Read the growth percentile guide.
- Baby feeding amount — for infants under 1 year, a separate calculation by body weight applies. Open the feeding amount guide.
Estimate your child's calorie needs now
IOM formula, anonymous, instant. With metric and imperial units.
Open the Child Calorie Needs Calculator →Frequently asked questions
Should I count calories for my child?
For healthy children: no. The growth curve, hunger cues and energy levels are better indicators. The calculator helps you estimate the order of magnitude — useful when a child suddenly eats much more or less, or for kids in serious sport.
My teenager eats huge amounts — is that normal?
Most likely yes. During the puberty growth spurt, needs rise by 30–50 %. As long as growth and overall well-being are good, the hunger is a body signal, not boredom.
My child is overweight — should I cut calories?
Not without medical advice. In children, the standard approach is usually weight stabilization rather than weight loss — the growing body "stretches" the existing weight. Talk to a pediatrician or registered dietitian.
From what age does the calculator apply?
From age 1. Babies under 12 months follow different recommendations — see the Baby Feeding Amount Calculator. For toddlers (1–2 years), the calculator uses the fixed IOM reference values without using height or weight.