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's weight is appropriate for their height and age.

2. How BMI Percentile is Calculated

The calculator first computes BMI using the standard formula:

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

3. Importance of BMI Percentile

Details: BMI percentile is the preferred measure for assessing weight status in children and teens because it accounts for normal differences in body fat between boys and girls and differences in body fat 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 minimal clothing and no shoes.

5. Frequently Asked Questions (FAQ)

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

Q2: Why use percentiles instead of BMI categories for adults?
A: Children's body fat changes with age and differs between boys and girls. Percentiles account for these normal variations.

Q3: How often should BMI be checked in children?
A: The American Academy of Pediatrics recommends BMI screening annually from age 2.

Q4: What are limitations of BMI percentile?
A: It doesn't distinguish between fat and muscle mass, and may be less accurate for very muscular children or those with certain medical conditions.

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