1. What is BMI for Children?

BMI (Body Mass Index) for children is a measure that adjusts weight for height, age, and sex. Unlike adults, children's BMI is interpreted relative to growth charts specific to their age and gender.

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 raw BMI number must be plotted on a growth chart or converted to a percentile to determine weight status.

3. Importance of BMI Calculation

Details: BMI-for-age is the recommended screening tool for overweight and obesity in children aged 2-18 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, and select gender. For accurate results, measurements should be taken with minimal clothing and no shoes.

5. Frequently Asked Questions (FAQ)

Q1: How is children's BMI different from adults?
A: Children's BMI is age- and sex-specific because their body composition varies as they grow. Results are interpreted using percentile growth charts.

Q2: What do the BMI percentiles 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 less muscle mass. It's a screening tool, not a diagnostic.

Q4: At what age should BMI monitoring start?
A: The American Academy of Pediatrics recommends BMI screening annually from age 2.

Q5: What if my child's BMI is high?
A: Consult a pediatrician. They may assess other factors like growth pattern, family history, and diet to determine if intervention is needed.