1. What is BMI for Children?

BMI (Body Mass Index) for children is a measure that adjusts weight for height. For children and teens, BMI is age- and sex-specific and is often referred to as BMI-for-age. Unlike adults, children's BMI must be interpreted relative to other children of the same age and sex.

2. How Does the Calculator Work?

The calculator uses the standard BMI formula:

Where:

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

Note: The calculator automatically converts height from centimeters to meters for the calculation.

3. Importance of BMI Calculation for Kids

Details: BMI-for-age is the recommended screening tool for overweight and obesity in children aged 2-19 years. It helps identify potential weight problems that may lead to health issues.

4. Using the Calculator

Tips: Enter weight in kilograms and height in centimeters. For accurate results, measure weight with minimal clothing and height without shoes. All values must be valid (weight > 0, height > 0).

5. Frequently Asked Questions (FAQ)

Q1: How is children's BMI different from adults?
A: Children's BMI is plotted on growth charts to show percentile ranking among peers of the same age and sex, rather than using fixed categories like adults.

Q2: What do the percentile ranges mean?
A: Underweight (<5th), Healthy weight (5th-85th), Overweight (85th-95th), Obese (≥95th). These percentiles are based on CDC growth charts.

Q3: Is BMI accurate for all children?
A: BMI is a screening tool, not a diagnostic. Very muscular children or those with certain medical conditions may need additional assessment.

Q4: How often should children's BMI be checked?
A: Yearly checks are recommended as part of routine health supervision visits.

Q5: What should I do if my child's BMI is high?
A: Consult with a healthcare provider who can evaluate growth patterns, diet, activity levels, and other health indicators.