1. What is BMI Percentile?

BMI percentile is a measure that compares a child's BMI to other children of the same age and sex. It helps determine if a child has a healthy weight relative to their peers.

2. How Does the Calculator Work?

The calculator uses the standard BMI formula:

Then compares the result to CDC growth charts for girls of the same age to determine the percentile.

3. Importance of BMI Percentile

Details: BMI percentile is the preferred measure for assessing weight in children and teens because it accounts for normal differences in body composition at various ages.

4. Using the Calculator

Tips: Enter weight in kilograms, height in meters, and age in years (2-20 years). For accurate results, measurements should be taken with proper technique.

5. Frequently Asked Questions (FAQ)

Q1: What do the percentile ranges mean?
A: Underweight (<5th), Healthy weight (5th-85th), Overweight (85th-95th), Obese (≥95th).

Q2: Why use percentiles instead of BMI categories?
A: Children's body composition changes with age, so percentiles provide age- and sex-specific context.

Q3: How often should BMI be checked in children?
A: The AAP recommends annual BMI screening for all children aged 2+ years.

Q4: Are there limitations to BMI percentile?
A: It doesn't distinguish between fat and muscle mass. Additional assessments may be needed for athletic children.

Q5: Where can I find official growth charts?
A: CDC growth charts are available at: https://www.cdc.gov/growthcharts/