Body mass index (BMI) is a measure of body fat based on height and weight that applies to children and adults.
For children and teens, BMI is age- and sex-specific as their body composition changes as they grow and mature.
The Centers for Disease Control and Prevention (CDC) recommends calculating a child’s BMI to screen for weight-related health problems. Early identification and intervention can help prevent or address overweight and obesity, reducing the risk of future health issues.