BMI Percentile Calculator for Children and Teens

Calculate Child & Teen BMI Percentile

Years (2-20)
Months (0-11)
Easily determine your child's or teen's BMI percentile using our free online calculator. Input age, gender, height, and weight to understand if they are in a healthy weight range. Get instant insights into their growth chart category for ages 2-20.

Formula:

The Body Mass Index (BMI) is calculated using the following formula:

BMI = Weight (kg) / (Height (m))2

For children and teens, BMI is interpreted differently than for adults. It is plotted on age- and gender-specific growth charts to determine a BMI-for-age percentile. This percentile indicates how a child's weight compares to other children of the same age and sex.

  • Underweight: Below the 5th percentile
  • Healthy Weight: 5th percentile to less than the 85th percentile
  • Overweight: 85th percentile to less than the 95th percentile
  • Obese: 95th percentile or greater

Note: Our calculator provides an approximation based on standard BMI principles and general categories for educational purposes. For a precise percentile and medical advice, consult a healthcare professional using official CDC or WHO growth charts.

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