# Kids Overweight/underweight Height And Weight Calculator

oys
B
How can I Find Out if My Child is Overweight or Underweight？
Method：
(1) Measure your child’s weight (in kg) and height (in cm);
(2) Find the height closest to your child’s height from the height column;
(3) Check the reference weights for ‘overweight’ and ‘underweight’ across the same row;
(4) Compare your child’s weight with the reference weights.
Body Weight
Body Weight
Boys
Boys
Example：
（kg）
（kg）
(1) A boy measures 91cm
Below
the
Above
the
in height and 13.5kg in
reference
reference
weight.
weight
weight
Child’s Height
Child’s Height
Underweight
Overweight
(2) Find 91cm on the
(cm)
(cm)
“Child’s Height” column
75
7.5
11.3
75
77
7.9
11.8
77
(3) Find the reference
79
8.2
12.3
79
weights on the same row.
81
8.6
12.9
81
For A boy of 91cm tall,
83
8.9
13.4
83
having a body weight less
85
9.3
13.9
85
than 10.3kg is
87
9.6
14.4
87
underweight, more than
89
10.0
15.0
89
15.5kg is overweight.
91
10.3
15.5
91
93
10.7
16.1
93
(4) Since the boy weighs
95
11.1
16.6
95
13.5 kg,he is of normal
97
11.5
17.2
97
weight.
99
11.9
17.8
99
101
12.3
18.4
101
103
12.7
19.1
103
105
13.2
19.7
105
107
13.6
20.4
107
109
14.1
21.2
109
111
14.6
21.9
111
113
15.2
22.8
113
115
15.7
23.6
115
117
16.3
24.5
117
119
17.0
25.5
119
121
17.6
26.5
121
123
18.4
27.5
123
125
19.1
28.6
125
127
19.9
29.8
127
129
20.7
31.0
129
131
21.6
32.3
131
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. Childe Health 1996:32. 103-109
Family Health Service
Underweight is defined as having a weight below 80% median weight for height, overweight is having a body weight above
120% median weight for
Department of Health
Rev. on Apr 2015