BMI Formula:
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BMI (Body Mass Index) is a screening tool for weight categories in children and teens aged 2-19 years. For children, BMI is age- and sex-specific and is often referred to as BMI-for-age.
The calculator uses the standard BMI formula:
Where:
Interpretation: The result is compared against CDC growth charts to determine the weight status percentile for children of the same age and sex.
Details: BMI-for-age is the recommended indicator 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 exact age (2-19 years). For accurate results, measurements should be taken with minimal clothing and no shoes.
Q1: What is considered a normal BMI for children?
A: A BMI between the 5th and 85th percentiles on the CDC growth chart is considered normal weight for age and sex.
Q2: Why is BMI interpreted differently for children?
A: Children's body composition varies as they grow, and between boys and girls. BMI-for-age accounts for these differences.
Q3: How often should children's BMI be checked?
A: The American Academy of Pediatrics recommends BMI screening annually starting at age 2.
Q4: What if my child's BMI is high?
A: Consult a healthcare provider. They may assess other factors like growth pattern, family history, and diet.
Q5: Are there limitations to BMI for children?
A: BMI doesn't distinguish between muscle and fat, so athletic children may have high BMI without excess fat.