Body surface area

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

If height is unknown

For body weight under 40 kg

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

This table was calculated using the Boyd equation

For body weight over 40 kg

Body weight (kg)Surface area (m2)
411.3
421.3
431.3
441.4
451.4
461.4
471.4
481.4
491.5
501.5
511.5
521.5
531.5
541.6
551.6
561.6
571.6
581.6
591.7
601.7
611.7
621.7
631.7
641.7
651.8
661.8
671.8
681.8
691.8
701.9
711.9
721.9
731.9
741.9
751.9
762.0
772.0
782.0
792.0
802.0
812.0
822.1
832.1
842.1
852.1
862.1
872.1
882.2
892.2
902.2

This table was calculated using the Boyd equation

 

If the height is known

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

 

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