1. What is BMI for Children?

BMI (Body Mass Index) for children is a measure that adjusts for age and gender, as children's body composition varies as they grow. Unlike adult BMI, children's BMI is compared to growth charts to determine percentiles.

2. How Does the Calculator Work?

The calculator uses the standard BMI formula:

Where:

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

Note: For children, the numeric BMI value must be plotted on age- and gender-specific growth charts to determine the percentile.

3. Importance of BMI Calculation

Details: BMI-for-age is the recommended screening tool for overweight and obesity in children aged 2-20 years. It helps identify potential weight problems that may lead to health issues.

4. Using the Calculator

Tips: Enter weight in kilograms, height in meters, age in years (2-20), and select gender. For accurate results, measurements should be taken with minimal clothing and no shoes.

5. Frequently Asked Questions (FAQ)

Q1: Why is BMI different for children than adults?
A: Children's body composition changes with growth, so their BMI must be compared to others of the same age and gender.

Q2: What do the percentile ranges mean?
A: Generally: <5th percentile (underweight), 5th-85th (healthy weight), 85th-95th (overweight), ≥95th (obese).

Q3: Is BMI accurate for all children?
A: BMI may overestimate body fat in muscular children and underestimate it in children with low muscle mass.

Q4: How often should children's BMI be checked?
A: Annual screening is recommended for all children aged 2+ years.

Q5: What should I do if my child's BMI is concerning?
A: Consult a pediatrician for further evaluation and guidance.