Body Surface Area in Children
Body-weight over 40 kg
Body-weight
(kg)Surface area
(m^2 )41 1.3
42 1.3
43 1.3
44 1.4
45 1.4
46 1.4
47 1.4
48 1.4
49 1.5
50 1.5
51 1.5
52 1.5
53 1.5
54 1.6
55 1.6
56 1.6
57 1.6
58 1.6
59 1.7
60 1.7
61 1.7
62 1.7
63 1.7
64 1.7
65 1.8
Body-weight
(kg)Surface area
(m^2 )66 1.8
67 1.8
68 1.8
69 1.8
70 1.9
71 1.9
72 1.9
73 1.9
74 1.9
75 1.9
76 2.0
77 2.0
78 2.0
79 2.0
80 2.0
81 2.0
82 2.1
83 2.1
84 2.1
85 2.1
86 2.1
87 2.1
88 2.2
89 2.2
90 2.2
Values are calculated using the Boyd equation
NoteHeight is not required to estimate body surface using these tables
Adapted by permission from Macmillan Publishers Ltd: Sharkey I et al,British Journal of Cancer2001; 85 (1): 23–28, © 2001