BMI Formula:
From: | To: |
BMI-for-age is a measure that accounts for a child's age and sex when assessing their weight status. For children and teens, BMI is age- and sex-specific and is often referred to as BMI-for-age.
The calculator uses the standard BMI formula adjusted for age and sex:
Where:
Explanation: The result is compared to growth charts specific for female children to determine weight status.
Details: BMI-for-age is the recommended measure for screening overweight and obesity in children and teens. It helps identify potential weight problems that may lead to health issues.
Tips: Enter weight in kilograms, height in meters, and age in years. All values must be valid (weight > 0, height > 0, age between 2-18).
Q1: Why is BMI different for children than adults?
A: Children's body composition varies as they grow, so BMI must be interpreted relative to other children of the same age and sex.
Q2: What is a healthy BMI range for female children?
A: Healthy ranges vary by age. Typically between 5th to 85th percentile on growth charts is considered healthy weight.
Q3: When should I be concerned about my child's BMI?
A: If BMI is below 5th percentile (underweight) or above 85th percentile (overweight), consult a healthcare provider.
Q4: Are there limitations to BMI for children?
A: BMI doesn't distinguish between fat and muscle mass. Athletic children may have higher BMI without excess fat.
Q5: How often should my child's BMI be checked?
A: Annual BMI checks are recommended as part of routine health supervision visits.