Table 9. Weight to Body Surface Area Conversion*


TABLE 9: Table 9. Weight to Body Surface Area Conversion^*

Body surface area (BSA) in square meters = K × (body wt in grams^2/3) × 10^-4
K = constant (10.1 for dogs and 10.0 for cats)
Dogs						Cats
Body wt (kg)	BSA (m²)	Body wt (kg)	BSA (m²)	Body wt (kg)	BSA (m²)
0.5	0.06	26	0.88	0.5	0.06
1	0.10	27	0.90	1	0.10
2	0.15	28	0.92	1.5	0.12
3	0.20	29	0.94	2	0.15
4	0.25	30	0.96	2.5	0.17
5	0.29	31	0.99	3	0.20
6	0.33	32	1.01	3.5	0.22
7	0.36	33	1.03	4	0.24
8	0.40	34	1.05	4.5	0.26
9	0.43	35	1.07	5	0.28
10	0.46	36	1.09	5.5	0.29
11	0.49	37	1.11	6	0.31
12	0.52	38	1.13	6.5	0.33
13	0.55	39	1.15	7	0.34
14	0.58	40	1.17	7.5	0.36
15	0.60	41	1.19	8	0.38
16	0.63	42	1.21	8.5	0.39
17	0.66	43	1.23	9	0.41
18	0.69	44	1.25	9.5	0.42
19	0.71	45	1.26	10	0.44
20	0.74	46	1.28
21	0.76	47	1.30
22	0.78	48	1.32
23	0.81	49	1.34
24	0.83	50	1.36
25	0.85

^*Adapted from Rosenthal R.C., Chemotherapy, in Textbook of Veterinary Internal Medicine: Diseases of the Dog and Cat, 4th ed., Ettinger S.J. and Feldman E.C., Eds. Copyright, 1995, with permission from Elsevier.

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