BMI Formula:
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BMI (Body Mass Index) for teens is a calculation that uses height and weight to estimate body fat. For teens, BMI is age- and sex-specific and is interpreted using percentile rankings rather than standard categories used for adults.
The calculator uses the standard BMI formula:
Where:
Interpretation: The result is compared to CDC growth charts to determine the percentile for the teen's age and gender.
Details: BMI screening for teens helps identify potential weight problems that may lead to health issues. However, it's only a screening tool and doesn't directly measure body fat.
Tips: Enter weight in kilograms, height in meters, select gender and exact age (13-19 years). For accurate results, measurements should be taken with minimal clothing and no shoes.
Q1: Why use percentiles for teens instead of fixed categories?
A: Teens grow at different rates, so percentiles account for normal variations in growth patterns during puberty.
Q2: What do the percentile categories mean?
A: Below 5th = underweight, 5th-85th = healthy weight, 85th-95th = overweight, 95th+ = obese.
Q3: Is BMI accurate for athletic teens?
A: BMI may overestimate body fat in muscular athletes. Additional assessments may be needed.
Q4: How often should teens have BMI calculated?
A: The AAP recommends annual BMI screening as part of routine health supervision visits.
Q5: What if my teen's BMI is high?
A: Consult a healthcare provider for further evaluation. They may assess diet, activity levels, and growth patterns.