1. What is BMI Percentile?

The BMI percentile is a measure that compares a child's BMI to other children of the same age and sex. The CDC growth charts are used to determine the weight status category for children and teens.

2. How Does the Calculator Work?

The calculator uses the standard BMI formula:

Where:

• \( weight \) — Body weight in kilograms
• \( height \) — Height in meters

Explanation: The BMI value is then compared to CDC growth charts for girls of the same age to determine the percentile.

3. Importance of BMI Percentile

Details: BMI percentile is the best indicator of weight status in children and teens. It helps identify potential weight problems that might lead to health issues.

4. Using the Calculator

Tips: Enter weight in kg, height in meters, and age in years (2-20 years). All values must be valid (weight > 0, height > 0, age between 2-20).

5. Frequently Asked Questions (FAQ)

Q1: What do the percentiles mean?
A: Below 5th percentile = underweight; 5th-85th = healthy weight; 85th-95th = overweight; Above 95th = obese.

Q2: Why use percentiles for children?
A: Children's body composition changes as they grow, so BMI must be interpreted relative to other children of the same age and sex.

Q3: How accurate is this calculator?
A: The BMI calculation is accurate, but the percentile is an estimate. For clinical use, consult official CDC growth charts.

Q4: What ages is this calculator for?
A: This calculator is designed for girls aged 2-20 years.

Q5: Should I be concerned about my child's BMI?
A: Any concerns about your child's growth should be discussed with a healthcare provider who can consider additional factors.