Child TDEE Calculator
Estimate daily calorie needs for kids and teens ages 2–18 using pediatric Estimated Energy Requirement (EER) equations based on age, sex, height, weight, and activity level.
This tool is part of our Health Calculators collection. You may also find our Child & Teen BMI Calculator helpful for growth context.
On this page
Enter Details
Disclaimer: This calculator estimates daily calorie needs for generally healthy children and teens ages 2–18. It does not replace medical advice. Children with underweight, obesity, eating disorders, chronic illness, pregnancy, or sports-performance goals should be assessed by a pediatrician or registered dietitian. If you are considering intentional weight change for a child or teen, seek professional guidance first.
How This Child TDEE Calculator Works
This calculator uses the Institute of Medicine (IOM) Estimated Energy Requirement (EER) equations — formulas designed for children and teens. Unlike adult TDEE formulas, these equations include an energy deposition component that accounts for normal growth.
For toddlers (ages 2 to 2 years 11 months), a simplified weight-based equation is used: EER = (89 × weight in kg − 100) + 20 kcal/day. For children ages 3–18, the calculator applies sex-specific equations that factor in age, weight, height, and physical activity level, plus an additional 20 kcal/day (ages 3–8) or 25 kcal/day (ages 9–18) for growth.
Why Children’s Calorie Needs Differ from Adults
Growing bodies need extra energy beyond basic metabolism. The IOM equations add a growth energy component to support bone development, tissue growth, and pubertal changes. Activity coefficients are also calibrated differently for younger bodies, reflecting how children move and expend energy throughout the day.
For this reason, using an adult TDEE calculator for a child or teen would produce less appropriate estimates. Always use age-appropriate equations for pediatric calorie estimates.
Understanding Activity Levels
The IOM defines four Physical Activity Levels (PAL) used in these equations:
- Sedentary — Minimal movement beyond basic daily living (mostly sitting, screen time).
- Low Active — Some daily movement like walking to school, light play, or household chores.
- Active — Regular moderate activity such as organized sports, cycling, or active play most days.
- Very Active — Intensive daily training, competitive athletics, or highly physical lifestyles.
For many school-age children who participate in regular physical activity, Active is a reasonable starting point.
A Note on Calorie Changes for Children
The optional planning targets shown for ages 5–18 are conservative estimates (±15% of maintenance). They are intended as a starting point for conversations with healthcare providers — not as unsupervised dietary plans.
Pediatricians often recommend that children maintain their current calorie intake and allow natural growth to improve body composition, rather than actively restricting food. Intentional calorie reduction in children can interfere with growth, development, and psychological well-being if not properly supervised.
When to Consult a Professional
While this calculator provides a useful estimate, professional guidance is essential in several situations:
- BMI percentile below the 5th or above the 95th
- Chronic health conditions, food allergies, or dietary restrictions
- High athletic training demands or competitive sports goals
- Signs of disordered eating or food anxiety
- Significant recent changes in weight or appetite
A registered dietitian can create a personalized nutrition plan that supports healthy growth and development while addressing specific concerns.
Frequently Asked Questions
General guidance only. For personalized advice, consult a pediatrician or registered dietitian.
Q1: How does the Child TDEE Calculator estimate daily calories?
A: A Child TDEE calculator estimates a child’s daily calorie needs for maintenance (often called “TDEE”) using pediatric methods. This calculator uses pediatric Estimated Energy Requirement (EER) equations designed for ages 2–18, which account for growth in addition to activity.
Q2: How does this Child TDEE calculator estimate calories for kids and teens?
A: It uses Institute of Medicine (IOM) EER equations based on age, sex, weight, height (for ages 3–18), and an activity (PA) coefficient. Results are an estimate and shown with a typical range because day-to-day needs vary.
Q3: Is this a TDEE calculator for teens (teen TDEE calculator)?
A: Yes. Ages 9–18 use the teen EER version of the pediatric equations (including a growth allowance). It’s intended for general planning, not for prescribing dieting targets.
Q4: Does this teen TDEE calculator work for female teens (teen TDEE calculator female)?
A: Yes. The equations are sex-specific, so selecting Female uses the pediatric female coefficients for ages 3–18.
Q5: Why shouldn’t I use an adult TDEE or BMR calculator for my child?
A: Adult TDEE/BMR calculators (like Mifflin–St Jeor) are built for adult physiology and do not include a growth allowance. Pediatric EER equations are designed for children and teens and are generally more appropriate for ages 2–18.
Q6: What activity level should I choose for my child (sedentary, low active, active, very active)?
A: Choose the level that best matches typical weekly routine. “Active” fits many kids who have regular play or sports most days; “Very Active” is usually for intense daily training. If unsure, start with Active and reassess using real-world patterns.
Q7: Why doesn’t activity level change the result for toddlers (age 2)?
A: For ages 2.0–2.11 years, the calculator uses the IOM toddler EER shortcut that is weight-based. Height and activity level are shown for continuity but aren’t applied in that toddler equation.
Q8: Is this TDEE calculator free , and can I share results?
A: Yes. This Child TDEE calculator is free to use, and the share link feature lets you reopen the same inputs later.
Q9: Is this a “TDEE calculator NHS” or an official tool for India (Child TDEE calculator India)?
A: No. This calculator is not affiliated with the NHS. It uses IOM pediatric EER equations and is meant as educational guidance. For individualized advice, use local healthcare services.
Q10: Does a “Child TDEE calculator India” need different equations?
A: The pediatric EER equations are not country-specific; they use age, sex, height, weight, and activity level. However, food choices and clinical guidance can vary by region, so consult a local pediatrician or dietitian for personalized planning.
Q11: Can I use this child calorie calculator for weight loss (child TDEE calculator to lose weight / teen TDEE calculator to lose weight)?
A: Use caution. Children and teens should not follow calorie deficits without guidance from a pediatrician or registered dietitian because energy needs support growth and development. Often, improving diet quality, routines, and activity while allowing growth is preferred over restriction.
Q12: Can I use this child TDEE calculator to gain weight?
A: If weight gain is a goal, it’s best done with professional guidance to ensure adequate nutrients for healthy growth. This calculator can provide a maintenance estimate to discuss with a pediatrician or dietitian.
Q13: Is 1500 calories enough for a 14-year-old boy?
A: It depends on height, weight, puberty stage, and activity level. For some teens it may be too low, especially with sports or growth spurts. Use the calculator to estimate needs and consult a professional before making changes.
Q14: Is 1200 calories okay for a 15-year-old? Can a 15-year-old go on a calorie deficit?
A: In many cases, 1200 kcal/day is too low for teens and may risk inadequate energy for growth and health. Any calorie deficit for a teen should be supervised by a pediatrician or registered dietitian.
Q15: How do I calculate calorie needs for kids without a calculator?
A: Pediatric calorie estimates can be calculated using EER equations (age, sex, height, weight, and PA). This tool shows the steps and applies the correct equation for the child’s age band.
Q16: How do I calculate TDEE for teenagers?
A: For teens, use pediatric EER equations (not adult TDEE multipliers) because they include growth allowances and teen-specific coefficients.
Q17: How to calculate kg by age?
A: You generally don’t calculate body weight from age alone. Weight should be measured and interpreted using growth charts and clinical context. If you’re concerned about growth patterns, consult a pediatrician.
Looking for adult calorie estimates? Try our Adult BMI Calculator for body mass index context and our TDEE Calculator for adult maintenance calories.
Sources
- Institute of Medicine (US). Dietary Reference Intakes for Energy, Carbohydrate, Fiber, Fat, Fatty Acids, Cholesterol, Protein, and Amino Acids (2005). Estimated Energy Requirement (EER) equations for children and adolescents. National Academies Press
- U.S. Department of Health and Human Services. Physical Activity Guidelines for Americans (2nd ed.). health.gov
- Centers for Disease Control and Prevention. Tips for Balancing Food and Activity. cdc.gov
- MedlinePlus. Nutrition — Child and Adolescent. U.S. National Library of Medicine. medlineplus.gov
- Johns Hopkins Medicine. School-Aged Child Nutrition. hopkinsmedicine.org
Methodology (Pediatric EER Equations)
This calculator estimates daily energy needs using the Institute of Medicine (IOM) Estimated Energy Requirement (EER) equations for ages 2–18. EER is designed for children and adolescents and includes an allowance for normal growth.
Inputs and units
- Age: years + months (converted to years)
- Weight: kg (or lb converted to kg)
- Height: meters (or cm / ft+in converted to meters; not used for toddlers)
- Sex: male/female
- Activity level: sedentary / low active / active / very active (PA coefficient)
Conversions
lb → kg: kg = lb × 0.45359237 cm → m: m = cm ÷ 100 ft+in → m: m = (ft×12 + in) × 0.0254
Equations used
Toddler (2.0–2.11 years): EER = (89 × weight_kg − 100) + 20 Ages 3–8: Male: EER = 88.5 − 61.9×age + PA×(26.7×weight_kg + 903×height_m) + 20 Female: EER = 135.3 − 30.8×age + PA×(10.0×weight_kg + 934×height_m) + 20 Ages 9–18: Male: EER = 88.5 − 61.9×age + PA×(26.7×weight_kg + 903×height_m) + 25 Female: EER = 135.3 − 30.8×age + PA×(10.0×weight_kg + 934×height_m) + 25
Worked example (illustrative)
Example: 12 years 0 months, Male, 40 kg, 150 cm (1.50 m), Active (PA=1.26)
Growth allowance (age 9–18): +25
EER = 88.5 − 61.9×12 + 1.26×(26.7×40 + 903×1.50) + 25
= 88.5 − 742.8 + 1.26×(1068 + 1354.5) + 25
= -654.3 + 1.26×2422.5 + 25
= -654.3 + 3052.35 + 25
= 2423.05 kcal/day (rounded to nearest 5 in the calculator)
Limitations
- Estimates are for generally healthy children and teens; individual needs vary.
- Not tailored for medical conditions, eating disorders, pregnancy, or lactation.
- Activity level selection can materially change results; choose a realistic daily level.
- For toddlers (2.0–2.11 years), the simplified equation is weight-based; activity/height are not applied.
Embed this calculator
Copy and paste this HTML into your site. Attribution link included.
<iframe src="https://calctypes.com/child-tdee-calculator/" style="width:100%;max-width:980px;height:980px;border:0;" loading="lazy"></iframe> <p><a href="https://calctypes.com/child-tdee-calculator/">Child TDEE Calculator by CalcTypes</a></p>