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Clinical Practice Guidelines

Median BMI tables

  • See also

    Management of eating disorders in the emergency department

    Percentage of median BMI (% mBMI) for age and gender

    GIRLS
    Age Median BMI for age Underweight
    90%    		 Moderate risk
    80%    		 High Concern
    70%
    9 16.3 14.7 13.0 11.4
    9.5 16.6 14.9 13.2 11.6
    10 16.8 15.2 13.5 11.8
    10.5 17.1 15.4 13.7 12.0
    11 17.4 15.7 14.0 12.2
    11.5 17.8 16.0 14.2 12.4
    12 18.1 16.3 14.5 12.7
    12.5 18.4 16.6 14.7 12.9
    13 18.7 16.8 15.0 13.1
    13.5 19.0 17.1 15.2 13.3
    14 19.3 17.4 15.5 13.5
    14.5 19.6 17.7 15.7 13.7
    15 19.9 17.9 15.9 13.9
    15.5 20.2 18.2 16.1 14.1
    16 20.4 18.4 16.3 14.3
    16.5 20.7 18.6 16.5 14.5
    17 20.9 18.8 16.7 14.6
    17.5 21.1 19.0 16.9 14.8
    18 21.3 19.1 17.0 14.9
    BOYS
    Age Median BMI for age Underweight
    90%    		 Moderate risk
    80%    		 High Concern
    70%
    9 16.1 14.5 12.9 11.3
    9.5 16.4 14.7 13.1 11.5
    10 16.6 15.0 13.3 11.6
    10.5 16.9 15.2 13.5 11.8
    11 17.2 15.5 13.7 12.0
    11.5 17.5 15.7 14.0 12.2
    12 17.8 16.0 14.2 12.5
    12.5 18.1 16.3 14.5 12.7
    13 18.4 16.6 14.8 12.9
    13.5 18.8 16.9 15.0 13.1
    14 19.1 17.2 15.3 13.4
    14.5 19.5 17.5 15.6 13.6
    15 19.8 17.8 15.9 13.9
    15.5 20.2 18.2 16.1 14.1
    16 20.5 18.5 16.4 14.4
    16.5 20.9 18.8 16.7 14.6
    17 21.2 19.1 17.0 14.9
    17.5 21.5 19.4 17.2 15.1
    18 21.9 19.7 17.5 15.3

    Reference List

    Last updated October 2025