Body surface area

Cite this article as:
Davis, T. Body surface area, Don't Forget the Bubbles, 2013. Available at:
http://doi.org/10.31440/DFTB.1860

For body weight under 40 kg

Body Weight (kg)Surface area (m2)
401.3
391.3
381.2
371.2
361.2
351.2
341.1
331.1
321.1
311.1
301.1
291.0
281.0
270.97
260.95
250.92
240.90
230.87
220.85
210.82
200.79
190.77
180.74
170.71
160.68
150.65
140.62
130.59
120.56
110.53
100.49
9.50.47
90.46
8.50.44
80.42
7.50.40
70.38
6.50.36
60.34
5.50.32
50.30
4.50.28
40.26
3.50.24
30.21
2.50.19
20.16
1.50.13
10.10

This table was calculated using the Boyd equation

For body weight over 40 kg

Body Weight (kg)Surface area (m2)
401.3
391.3
381.2
371.2
361.2
351.2
341.1
331.1
321.1
311.1
301.1
291.0
281.0
270.97
260.95
250.92
240.90
230.87
220.85
210.82
200.79
190.77
180.74
170.71
160.68
150.65
140.62
130.59
120.56
110.53
100.49
9.50.47
90.46
8.50.44
80.42
7.50.40
70.38
6.50.36
60.34
5.50.32
50.30
4.50.28
40.26
3.50.24
30.21
2.50.19
20.16
1.50.13
10.10

This table was calculated using the Boyd equation

If the height is known

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