Calculate your body mass index (BMI) for Children and Teenagers

**How to Check BMI for Kids and Teens**

Use this tool to:

- Check the Body Mass Index (BMI) of children and teenagers aged 2 to 17

- Get advice on what to do next

**Important:**

- This tool is not for diagnosing any health issues. If you're concerned about weight, contact a local pharmacist or doctor.

**Who Shouldn't Use This Tool:**

- People aged 18 or older

- Pregnant individuals

- Those with a diagnosed eating disorder or who suspect they might have one

- Anyone with a condition that affects their height

**How BMI is Calculated for Kids and Teens:**

BMI for children and teens is shown as a "centile," which compares their BMI to others of the same age and sex.

- **For example:** 

A girl at the 75th centile weighs more than 75 out of 100 girls her age.

Here's what the centiles mean:

- **Underweight:** 2nd centile or below

- **Healthy Weight:** Between the 2nd and 91st centiles

- **Overweight:** 91st centile or above

- **Very Overweight:** 98th centile or above

**Note:** This BMI calculation doesn’t consider muscle mass, which weighs more than fat.