About This Calculator
This calculator estimates Basal Metabolic Rate (BMR) for children aged 3 to 18 using WHO formulas. BMR is the number of calories required to support essential bodily functions at rest.
How It Works
The WHO equations vary by gender and age group. This tool applies separate formulas for boys and girls within specific age ranges, based on weight in kilograms.
Girls
- Ages 3–10: BMR = 16.252 × weight + 1023.2
- Ages 10–18: BMR = 8.365 × weight + 845.6
- Ages 3–10: BMR = 16.969 × weight + 161.8
- Ages 10–18: BMR = 8.171 × weight + 558.5
Frequently Asked Questions
What is BMR?
BMR is the number of calories your body burns at rest to support vital functions like breathing, circulation, and cell growth.
Why does BMR vary by gender and age?
Because children have different growth patterns and body composition based on gender and age, BMR requirements differ accordingly.
Is this calculator accurate?
This tool offers a reliable estimate using WHO data. For clinical accuracy, consult a pediatric healthcare provider.