Conversion Tables for Weight in Kilograms to Body Surface Area (m2)

Dogs

  

Cats
Kg M2 Kg M2 Kg M2
0.5 0.06 33 1.03 2.0 0.159
1 0.10 34 1.05 2.5 0.184
2 0.15 35 1.07 3.0 0.208
3 0.20 36 1.09 3.5 0.231
4 0.25 37 1.11 4.0 0.252
5 0.29 38 1.13 4.5 0.273
6 0.33 39 1.15 5.0 0.292
7 0.36 40 1.17 5.5 0.311
8 0.40 41 1.19 6.0 0.330
9 0.43 42 1.21 6.5 0.348
10 0.46 43 1.23 7.0 0.366
11 0.49 44 1.25 7.5 0.383
12 0.52 45 1.26 8.0 0.400
13 0.55 46 1.28 8.5 0.416
14 0.58 47 1.30 9.0 0.432
15 0.60 48 1.32 9.5 0.449
16 0.63 49 1.34 10 0.464
17 0.66 50 1.36    
18 0.69 52 1.41    
19 0.71 54 1.44    
20 0.74 56 1.48    
21 0.76 58 1.51    
22 0.78 60 1.55    
23 0.81 62 1.58    
24 0.83 64 1.62    
25 0.85 66 1.65    
26 0.88 68 1.68    
27 0.90 70 1.72    
28 0.92 72 1.75    
29 0.94 74 1.78    
30 0.96 76 1.81    
31 0.99 78 1.84    
32 1.01 80 1.88    

The table is derived from the equation:
Approximate Surface area in m2 = 10.1 (10.0 for cats) * (weight in grams)2/3
                                                                                    10000