Child BMI Percentile Calculator

What is Child BMI Percentile?

BMI percentile for children and teens is different from adult BMI. For children, BMI is age and gender specific and is often referred to as BMI-for-age.

The CDC growth charts show BMI percentiles for children aged 2-20 years. A child's BMI percentile indicates how their BMI compares to other children of the same age and gender.

Why Use Percentiles Instead of BMI Categories?

Children's body composition changes as they grow and differs between boys and girls. Using BMI percentiles allows healthcare providers to track growth patterns and identify potential weight problems while accounting for normal growth and development.

How to Interpret BMI Percentile

• Underweight (Less than 5th percentile): May indicate nutritional deficiency or other health concerns. Consultation with a healthcare provider is recommended.
• Healthy weight (5th to 85th percentile): Child is at a healthy weight for their age, gender, and height.
• Overweight (85th to 95th percentile): May indicate risk of becoming obese. Healthcare provider consultation recommended for weight management strategies.
• Obese (95th percentile or greater): Child is at higher risk for health problems. Healthcare provider should be consulted for comprehensive evaluation and management.

Important Considerations

• BMI is a screening tool, not a diagnostic tool
• Athletes or very muscular children may have high BMI but low body fat
• BMI doesn't directly measure body fat percentage
• Growth patterns vary - some children go through periods of rapid growth
• Always consult with a healthcare provider for proper evaluation

When to Seek Medical Advice

If your child's BMI percentile is below the 5th or above the 85th percentile, or if you have concerns about their growth or weight, consult with a pediatrician or healthcare provider. They can perform a comprehensive evaluation and provide personalized guidance.