BMI Percentile Calculator
BMI Percentile (Ages 2–20)
Formula
BMI = weight(kg) / height(m)². Percentile categories: <5th underweight, 5–85th normal, 85–95th overweight, >95th obese.
Frequently Asked Questions
Why is BMI percentile used for children instead of standard BMI?
Children's body composition changes as they grow, so BMI is interpreted relative to age and sex using percentile charts rather than fixed adult categories.
What BMI percentile categories are used for children?
Underweight: below 5th percentile; Normal weight: 5th to 85th percentile; Overweight: 85th to 95th percentile; Obese: above 95th percentile.
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