Pediatric BMI Calculator
Calculate Body Mass Index for children and adolescents
About this calculator
The Pediatric BMI Calculator determines Body Mass Index specifically for children and adolescents aged 2-19 years. Unlike adult BMI calculations, pediatric BMI requires age and sex considerations since children's body composition changes as they grow. This tool helps parents, healthcare providers, and educators assess whether a child's weight falls within healthy ranges by comparing their BMI to standardized percentiles for their age group, enabling early identification of potential weight-related health concerns.
How to use
Enter your child's current weight, height, age, and select their sex. The calculator will compute their BMI and display the corresponding percentile ranking compared to other children of the same age and sex. Results show whether the child falls into underweight, healthy weight, overweight, or obese categories based on CDC growth charts.
Frequently asked questions
How is pediatric BMI different from adult BMI?
Pediatric BMI accounts for age and sex using percentiles, while adult BMI uses fixed categories regardless of age or gender differences.
What BMI percentile is considered healthy for children?
A healthy BMI percentile for children typically falls between the 5th and 85th percentiles for their age and sex group.
At what age should I start tracking my child's BMI?
BMI tracking can begin at age 2, as growth patterns become more predictable and comparable to standardized pediatric charts.