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BMI Formula:
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The Body Mass Index (BMI) is a measure that uses height and weight to estimate body fat. For children, BMI is age and sex-specific and is presented as a percentile compared to children of the same age and sex.
The calculator uses the BMI formula:
Where:
Explanation: The formula calculates body mass index by dividing weight by the square of height, providing a standardized measure of body composition.
Details: BMI screening for children helps identify potential weight problems, but should be followed up with additional assessments since children's body composition varies with age and growth patterns.
Tips: Enter weight in kilograms and height in meters. Ensure accurate measurements for reliable results. For children, BMI results should be interpreted using age and sex-specific growth charts.
Q1: How is children's BMI different from adults?
A: Children's BMI is interpreted using percentile charts specific to age and sex, rather than fixed categories like adults, because body composition changes as children grow.
Q2: What are the BMI categories for children?
A: Underweight (<5th percentile), Healthy weight (5th to <85th percentile), Overweight (85th to <95th percentile), Obese (≥95th percentile).
Q3: When should BMI be measured in children?
A: Regular BMI screening is recommended annually for children aged 2 years and older as part of routine health maintenance.
Q4: Are there limitations to BMI for children?
A: BMI doesn't distinguish between fat and muscle mass, so athletic children may have higher BMI without excess fat. It should be used as a screening tool, not a diagnostic measure.
Q5: What should I do if my child's BMI is concerning?
A: Consult with a healthcare provider who can perform additional assessments and consider factors like growth patterns, family history, and overall health.