## How Can I Find Out if My Child is Overweight or Underweight? (BOYS)

(Content revised 04/2015)

### Method:

- Measure your child's weight (in kg) and height (in cm);
- Find the height closest to your child's height from the height column;
- Check the reference weights for 'overweight' and 'underweight' across the same row;
- Compare your child's weight with the reference weights.

BOYS | Body Weight (kg) Below the reference weight | Body Weight (kg) Above the reference weight |
---|---|---|

Child's Height (cm) | Underweight | Overweight |

75 | 7.5 | 11.3 |

77 | 7.9 | 11.8 |

79 | 8.2 | 12.3 |

81 | 8.6 | 12.9 |

83 | 8.9 | 13.4 |

85 | 9.3 | 13.9 |

87 | 9.6 | 14.4 |

89 | 10.0 | 15.0 |

91 | 10.3 |
15.5 |

93 | 10.7 | 16.1 |

95 | 11.1 | 16.6 |

97 | 11.5 | 17.2 |

99 | 11.9 | 17.8 |

101 | 12.3 | 18.4 |

103 | 12.7 | 19.1 |

105 | 13.2 | 19.7 |

107 | 13.6 | 20.4 |

109 | 14.1 | 21.2 |

111 | 14.6 | 21.9 |

113 | 15.2 | 22.8 |

115 | 15.7 | 23.6 |

117 | 16.3 | 24.5 |

119 | 17.0 | 25.5 |

121 | 17.6 | 26.5 |

123 | 18.4 | 27.5 |

125 | 19.1 | 28.6 |

127 | 19.9 | 29.8 |

129 | 20.7 | 31 |

131 | 21.6 | 32.3 |

### Example:

- A boy measures 91cm in height and 13.5kg in weight.
- Find 91cm on the "Child's Height" column.
- Find the reference weights on the same row. For a boy of 91 cm tall, having a body weight less than 10.3 kg is underweight, more than 15.5 kg is overweight.
- Since the boy weighs 13.5 kg, he is of normal weight.

Source of information: Leung SSF, Lau JTF, Tse LY, Oppenheimer SJ. Weight-for-age and weight-for-height reference for Hong Kong children from birth to 18 years. J Paediatr. Child Health 1996:32.103-109

Underweight is defined as having a weight below 80% median weight for height, overweight is having a body weight above 120% median weight for height