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Body surface area

Team DFTB

Written on 29/06/2021
, Last updated 14/10/2021

Cite this article as:

Team DFTB

. Body surface area, Don't Forget the Bubbles, 2021. Available at: https://doi.org/10.31440/DFTB.1860

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For body weight under 40 kg

Body Weight (kg)	Surface area (m2)
40	1.3
39	1.3
38	1.2
37	1.2
36	1.2
35	1.2
34	1.1
33	1.1
32	1.1
31	1.1
30	1.1
29	1.0
28	1.0
27	0.97
26	0.95
25	0.92
24	0.90
23	0.87
22	0.85
21	0.82
20	0.79
19	0.77
18	0.74
17	0.71
16	0.68
15	0.65
14	0.62
13	0.59
12	0.56
11	0.53
10	0.49
9.5	0.47
9	0.46
8.5	0.44
8	0.42
7.5	0.40
7	0.38
6.5	0.36
6	0.34
5.5	0.32
5	0.30
4.5	0.28
4	0.26
3.5	0.24
3	0.21
2.5	0.19
2	0.16
1.5	0.13
1	0.10

This table was calculated using the Boyd equation

For body weight over 40 kg

Body Weight (kg)	Surface area (m2)
40	1.3
39	1.3
38	1.2
37	1.2
36	1.2
35	1.2
34	1.1
33	1.1
32	1.1
31	1.1
30	1.1
29	1.0
28	1.0
27	0.97
26	0.95
25	0.92
24	0.90
23	0.87
22	0.85
21	0.82
20	0.79
19	0.77
18	0.74
17	0.71
16	0.68
15	0.65
14	0.62
13	0.59
12	0.56
11	0.53
10	0.49
9.5	0.47
9	0.46
8.5	0.44
8	0.42
7.5	0.40
7	0.38
6.5	0.36
6	0.34
5.5	0.32
5	0.30
4.5	0.28
4	0.26
3.5	0.24
3	0.21
2.5	0.19
2	0.16
1.5	0.13
1	0.10

This table was calculated using the Boyd equation

If the height is known

Use Royal Children’s Hospital, Melbourne’s BSA calculator.

Author

Team DFTB

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