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Teen Calorie Needs Calculator

Work out teen calorie needs instantly with clear inputs, formula shown and shareable results.

About Teen Calorie Needs Calculator

Uses the Schofield equations for the 10 to 18 year age band and applies an activity factor, with a growth-supporting protein target.

Formula

Schofield equations (10 to 18 years)

Boys: BMR = 17.5 x weight + 651. Girls: BMR = 12.2 x weight + 746. Energy needs = BMR x activity factor

Worked example

With the default values below, Teen Calorie Needs Calculator returns Estimated daily energy needs of 2,892. Change any input above and every figure here is recalculated in your browser.

Inputs used

Ageaccepts 10–18 years
15 years
Sexone of Boy, Girl
Boy
Weightaccepts 25–130 kg
60 kg
Activity levelone of Low (1.4), Moderate (1.7), High (2.0)
Moderate (1.7)

Results

Estimated daily energy needs
2,892 kcal/day
Basal metabolic rate
1,701 kcal/day
Protein target at 1.2 g/kg
72.0 g/day
Energy per kilogram
48.20 kcal/kg/day

Step by step

  1. 1Values used
  2. 2Schofield equations (10 to 18 years)
  3. 3Estimated daily energy needs= 2,892 kcal/day
  4. 4Basal metabolic rate= 1,701 kcal/day
  5. 5Protein target at 1.2 g/kg= 72.0 g/day
  6. 6Energy per kilogram= 48.20 kcal/kg/day

Assumptions and limits

  • The result is derived only from the 4 inputs listed above. Anything not among them is not part of the calculation.
  • In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
  • Figures are rounded for display to 2 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.
  • Educational estimate only. Not a substitute for professional clinical judgement, and must not be used to make treatment or dosing decisions.
  • This is an estimate for general information and not professional medical advice. See the full disclaimer for the limits that apply to this kind of calculator.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

Educational estimate only. Not a substitute for professional clinical judgement, and must not be used to make treatment or dosing decisions.

Frequently Asked Questions

Why do adolescent needs peak?

The growth spurt adds both tissue deposition and a rising basal rate, so energy needs peak around 14 to 17 in boys.

Do athletes need more?

Considerably. Adolescent athletes training daily can need 3,500 to 5,000 kcal a day.

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