1. What is BMI for Children?

BMI (Body Mass Index) for children is a screening tool that assesses whether a child is underweight, healthy weight, overweight, or obese. Unlike adults, children's BMI is age and gender-specific and is compared to growth charts.

2. How Does the Calculator Work?

The calculator uses the standard BMI formula:

The result is then compared to CDC growth charts to determine the percentile for the child's age and gender.

3. Understanding BMI Percentiles

Percentile Ranges:

• <5th percentile: Underweight
• 5th to <85th percentile: Healthy weight
• 85th to <95th percentile: Overweight
• ≥95th percentile: Obese

These percentiles are based on CDC growth charts that account for normal growth patterns in children.

4. Using the Calculator

Tips: Enter weight in kilograms, height in meters, and exact 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: Why use BMI for children instead of adults?
A: Children's body composition changes as they grow, so BMI must be interpreted relative to other children of the same age and sex.

Q2: Where can I find official CDC growth charts?
A: CDC growth charts are available for download at the CDC website (www.cdc.gov/growthcharts).

Q3: How often should my child's BMI be calculated?
A: Pediatricians typically calculate BMI at all well-child visits from age 2 through adolescence.

Q4: What if my child is very muscular?
A: BMI may overestimate body fat in muscular children. Additional assessments may be needed.

Q5: Can I use this for children under 2?
A: No, BMI is not recommended for children under 2 years. Weight-for-length charts are used instead.