BMI Percentile Calculator for Girls (2-19 Years)
Calculate BMI Percentiles for girls using CDC/WHO growth charts. Accurately identify underweight or obesity in children.
About
Adult BMI metrics do not apply to children. For girls aged 2 to 19, body composition changes rapidly with age. This tool uses the CDC and WHO growth reference data to calculate a "Percentile" ranking. A result at the 85th percentile means the child has a higher BMI than 85% of her peers. This context is essential for parents and pediatricians to track growth patterns and identify early signs of health issues.
Formulas
Child BMI is calculated the same as adults, but interpreted differently:
The Z-score (Z) is derived using the LMS parameters (L, M, S) for the specific age:
This Z-score is then converted to a percentile using standard normal distribution integration.
Reference Data
| Percentile Range | Category | Interpretation |
|---|---|---|
| < 5th | Underweight | May indicate malnutrition or underlying metabolic issues. |
| 5th - 84th | Healthy Weight | Optimal growth trajectory for age and height. |
| 85th - 94th | Overweight | Risk zone. Lifestyle adjustments often recommended. |
| ≥ 95th | Obesity | High risk of developing adult obesity and diabetes. |