1. What is BMI for Children?

BMI (Body Mass Index) is a screening tool for weight categories in children and teens. For children, BMI is age- and sex-specific and is often referred to as BMI-for-age. The CDC provides growth charts to interpret BMI values for children.

2. How Does the Calculator Work?

The calculator uses the standard BMI formula:

For children and teens, the BMI number is plotted on the CDC BMI-for-age growth charts to determine the corresponding BMI-for-age percentile.

3. Importance of BMI Calculation

Details: BMI-for-age is the most widely used indicator to screen for weight problems in children. It can identify potential weight issues that may lead to health problems.

4. Using the Calculator

Tips: Enter weight in kilograms, height in meters, age in years (2-19), and select gender. The calculator will provide BMI and general category based on CDC guidelines.

5. Frequently Asked Questions (FAQ)

Q1: Why is BMI different for children than adults?
A: Children's body composition varies as they grow, so BMI must be interpreted relative to other children of the same age and sex.

Q2: What are the CDC BMI categories for children?
A: Underweight (<5th percentile), Healthy weight (5th to <85th percentile), Overweight (85th to <95th percentile), Obese (≥95th percentile).

Q3: When should I be concerned about my child's BMI?
A: Consult a healthcare provider if your child's BMI is below the 5th percentile or at or above the 85th percentile.

Q4: Are there limitations to BMI for children?
A: BMI doesn't directly measure body fat and may not reflect body composition changes during puberty or in very muscular children.

Q5: Where can I find CDC growth charts?
A: CDC growth charts are available at www.cdc.gov/growthcharts/.