Teen Calorie Needs Calculator

Find teen calorie needs from age, size, and activity. Compare outputs, charts, and export-ready summaries. Use the estimator for balanced planning and clearer discussions.

Calculator

Designed for ages 13 to 18.

Example Data Table

Example Sex Age Activity Height Weight Estimated Daily Calories
A Female 14 Low Active 160 cm 50 kg 2,043
B Male 16 Active 172 cm 62 kg 3,166
C Female 17 Very Active 165 cm 58 kg 2,946
D Male 13 Sedentary 158 cm 48 kg 2,017

Formula Used

This calculator estimates daily energy needs with adolescent Estimated Energy Requirement equations. It is configured for teens aged 13 to 18.

Boys 9–18:
EER = 88.5 − (61.9 × age) + PA × [(26.7 × weight in kg) + (903 × height in m)] + 25
Girls 9–18:
EER = 135.3 − (30.8 × age) + PA × [(10.0 × weight in kg) + (934 × height in m)] + 25
Activity factors used:
Boys: Sedentary 1.00, Low Active 1.13, Active 1.26, Very Active 1.42
Girls: Sedentary 1.00, Low Active 1.16, Active 1.31, Very Active 1.56

Resting calories are also shown using adolescent Schofield equations. Macro ranges use the Acceptable Macronutrient Distribution Range, giving practical carbohydrate, protein, and fat gram targets.

How to Use This Calculator

  1. Choose metric or imperial units.
  2. Select sex, then enter age from 13 to 18.
  3. Pick the activity level that best matches typical days.
  4. Enter height and weight in your chosen unit system.
  5. Set usual meals and snacks per day.
  6. Press the calculate button.
  7. Review calories, planning band, macros, BMI screening value, and the Plotly chart.
  8. Use the CSV or PDF buttons to export results.

FAQs

1) What age range does this calculator cover?

This version is built for ages 13 through 18. That range aligns with the adolescent energy equations used here. For younger children or adults, use an age-appropriate calculator instead.

2) Is this a medical diagnosis tool?

No. It provides an educational estimate for daily calorie planning. Medical nutrition advice should come from a pediatrician, registered dietitian, or another qualified professional.

3) Why does activity level change the result so much?

Activity level changes the physical activity factor in the equation. More movement, sports, walking, and training usually increase the calories needed to support daily life and growth.

4) Does the calculator support both metric and imperial units?

Yes. You can enter centimeters and kilograms or feet, inches, and pounds. The calculator converts inputs internally so the same equation can be applied consistently.

5) What does the planning band mean?

The planning band is a simple ±5% range around the estimate. It helps with meal planning when daily appetite, schedules, and activity vary slightly from one day to another.

6) Can BMI alone judge a teen’s health?

No. Teen BMI should be interpreted with age-and-sex percentile charts. This page shows BMI only as a screening value, not a full health assessment.

7) Are the macro grams strict targets?

No. They are planning ranges based on accepted macro distribution guidance. Meal preferences, sports needs, culture, and clinician recommendations may justify a different split.

8) When should a teen use professional guidance?

Professional guidance is important for eating disorders, chronic illness, diabetes, pregnancy, rapid weight change, digestive issues, or intensive competitive sports training.

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Important Note: All the Calculators listed in this site are for educational purpose only and we do not guarentee the accuracy of results. Please do consult with other sources as well.