Calculator Inputs
Example Data Table
| Profile | Age | Sex | Weight | Height | Equation | Estimated BMR |
|---|---|---|---|---|---|---|
| Example A | 7 years | Boy | 25 kg | 122 cm | Schofield W+H | 1063.62 kcal/day |
| Example B | 9 years | Girl | 30 kg | 132 cm | Schofield W+H | 1093.85 kcal/day |
| Example C | 14 years | Boy | 50 kg | 162 cm | Schofield W+H | 1550.26 kcal/day |
| Example D | 15 years | Girl | 52 kg | 160 cm | Schofield W+H | 1378.98 kcal/day |
Formula Used
This calculator estimates child baseline energy using three pediatric equation families. It then extends the result with activity and stress multipliers for planning.
1) Schofield Weight Formula
Boys 0–3: 59.512 × weight − 30.4
Boys 3–10: 22.706 × weight + 504.3
Boys 10–18: 17.686 × weight + 658.2
Girls 0–3: 58.317 × weight − 31.1
Girls 3–10: 20.315 × weight + 485.9
Girls 10–18: 13.384 × weight + 692.6
2) Schofield Weight + Height Formula
Boys 0–3: 0.167 × weight + 15.174 × height − 617.6
Boys 3–10: 19.59 × weight + 1.303 × height + 414.9
Boys 10–18: 16.25 × weight + 1.372 × height + 515.5
Girls 0–3: 16.252 × weight + 10.232 × height − 413.5
Girls 3–10: 16.969 × weight + 1.618 × height + 371.2
Girls 10–18: 8.365 × weight + 4.65 × height + 200.0
3) WHO Weight Formula
Boys 0–3: 60.9 × weight − 54
Boys 3–10: 22.7 × weight + 495
Boys 10–18: 17.5 × weight + 651
Girls 0–3: 61.0 × weight − 51
Girls 3–10: 22.5 × weight + 499
Girls 10–18: 12.2 × weight + 746
Extended Planning Step
Estimated Daily Calories = Selected BMR × Activity Factor × Stress Factor
This does not replace a clinical assessment. It simply turns the resting estimate into a broader planning figure.
How to Use This Calculator
- Select metric or imperial units.
- Enter the child’s age, sex, weight, and height.
- Choose one pediatric equation.
- Select an activity factor that best matches routine movement.
- Keep stress factor at 1.00 unless you need a planning adjustment.
- Press the calculate button.
- Review BMR, maintenance estimates, BMI, and graph output.
- Use CSV or PDF export to save the summary.
FAQs
1) What does child BMR mean?
It is an estimate of calories the body uses at rest for essential functions, such as breathing, circulation, temperature control, and tissue maintenance.
2) Which equation should I choose?
Schofield weight plus height is often useful when both measurements are reliable. Weight-only options are helpful when height is uncertain or a quick estimate is enough.
3) Can I use pounds and inches?
Yes. Switch the unit selector to imperial. The calculator converts the values internally before applying the selected child equation.
4) Why does the page also show daily calorie estimates?
BMR is a resting baseline. Daily needs are usually higher, so the calculator adds activity and stress multipliers to provide a broader planning view.
5) Is BMI enough to assess a child?
No. This page shows BMI as a raw number only. Proper child interpretation usually needs age-specific growth chart context and professional review.
6) Should I change the stress factor during illness?
Only as a rough planning step. Illness, recovery, fever, and growth patterns can change needs, so medical guidance is better for important decisions.
7) What do the CSV and PDF buttons save?
They save the current result summary. CSV exports the numeric fields. PDF exports the visible result report for easy sharing or records.
8) Is this calculator for diagnosis?
No. It is an educational estimator. Growth problems, feeding issues, sports plans, and disease-related nutrition questions need personalized professional assessment.