Child & Teen BMI Calculator 👶

Determine your child's **BMI-for-Age Percentile** and **Weight Status** using standard $\text{CDC}$ guidelines (Ages 2-20).

1. Enter Child's Metrics

Measurement System

Metric (kg/cm) US (lbs/in)

Weight (kg)

Height (cm)

Age (Years)

Ages 2.0 to 20.0 years only.

Age (Months)

0 to 11 months.

Sex

Required for $\text{BMI}$-for-Age Percentile calculation.

BMI-for-Age Report

Body Mass Index (BMI)

kg/m²

BMI Percentile

Age & Sex Adjusted

Weight Status Classification

Status	BMI-for-Age Percentile
Underweight	Below the 5th percentile
Healthy Weight	5th percentile up to the 85th percentile
Overweight	85th percentile up to the 95th percentile
Obesity	Equal to or greater than the 95th percentile

⚠️ **IMPORTANT:** The percentile shown here is an **educational placeholder** for demonstration. Accurate **BMI-for-Age Percentile** calculation requires using **$\text{CDC}$ Growth Chart data**, which is too large for this client-side script. Consult a healthcare provider for accurate assessment.

Body Mass Index (BMI) Calculation Formula

BMI is a measure of body fat based on height and weight. For both children and adults, the formula is the same:

BMI = \text{Weight} (\text{kg}) / (\text{Height} (\text{m}))^{2}

Unlike adults, the **$\text{BMI}$ value itself is not the diagnostic tool for children**; its corresponding **Percentile** relative to the child's age and sex is what determines their weight status.