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  Length       Bass       Walleye       N. Pike  
in cm   lb kg   lb kg   lb kg
12 30   1.1 0.5   0.6 0.3   0.5 0.2
13 33   1.4 0.6   0.8 0.4   0.6 0.3
14 36   1.7 0.8   1.0 0.5   0.8 0.4
15 38   2.1 1.0   1.3 0.6   1.0 0.4
16 41   2.6 1.2   1.5 0.7   1.2 0.5
17 43   3.1 1.4   1.8 0.8   1.4 0.6
18 46   3.6 1.7   2.2 1.0   1.7 0.8
19 48   4.3 1.9   2.5 1.2   2.0 0.9
20 51   5.0 2.3   3.0 1.3   2.3 1.0
21 53   5.8 2.6   3.4 1.6   2.6 1.2
22 56   6.7 3.0   3.9 1.8   3.0 1.4
23 58   7.6 3.4   4.5 2.0   3.5 1.6
24 61   8.6 3.9   5.1 2.3   3.9 1.8
25 64   9.8 4.4   5.8 2.6   4.5 2.0
26 66   11.0 5.0   6.5 3.0   5.0 2.3
27 69   12.3 5.6   7.3 3.3   5.6 2.6
28 71   13.7 6.2   8.1 3.7   6.3 2.8
29 74   15.2 6.9   9.0 4.1   7.0 3.2
30 76   16.9 7.7   10.0 4.5   7.7 3.5
31 79   18.6 8.4   11.0 5.0   8.5 3.9
32 81   r     12.1 5.5   9.4 4.2
33 84   e     13.3 6.0   10.3 4.7
34 86   a     14.6 6.6   11.2 5.1
35 89   l     15.9 7.2   12.3 5.6
36 91   l     17.3 7.8   13.3 6.0
37 94   y     18.8 8.5   14.5 6.6
38 97   b     20.3 9.2   15.7 7.1
39 99   i     22.0 10.0   16.9 7.7
40 102   g     23.7 10.8   18.3 8.3


Fish Weight Formulas
Species Formula
(measure inches: weight = pounds)		 Formula
(measure centimetres: weight = kilograms)
Bass ((length x length) x girth) / 1200 ((length x length) x girth) / 45000
or (length x length x length) / 1600 (length x length x length) / 60000
Walleye (length x length x length) / 2700 (length x length x length) / 100000
N. Pike (length x length x length) / 3500 (length x length x length) / 130000
Trout ((girth x girth) x length) / 800 ((girth x girth) x length) / 30000


Lake Trout Chart
The following chart was kindly provide to me by Donald Kindt of Rideau Ferry who used it when living in Northern Canada. It should also work for Lake Trout on the Rideau. Thanks Don!

Girth: 17" 18" 19" 20" 21" 22" 23" 24" 25" 26" 27" 28"
                         
Length Weight in Pounds
27" 9.8 10.9 12.2 13.5 14.9 16.3 17.9 19.4 21.1 22.8 24.6 26.5
28" 10.1 11.3 12.6 14.0 15.4 16.9 18.5 20.2 21.9 23.7 25.5 27.4
29" 10.5 11.7 13.1 14.5 16.0 17.5 19.2 20.9 22.7 24.5 26.4 28.4
30" 10.6 12.2 13.5 15.0 16.5 18.2 19.8 21.6 23.4 25.4 27.3 29.4
31" 11.2 12.6 14.0 15.5 17.1 18.8 20.5 22.3 24.2 26.2 28.2 30.4
32" 11.6 13.0 14.4 16.0 17.6 19.4 21.2 23.0 25.0 27.0 29.2 31.4
33" 11.9 13.4 14.9 16.5 18.2 20.0 21.8 23.8 25.8 27.9 30.1 32.3
34" 12.3 13.8 15.3 17.0 18.7 20.6 22.5 24.5 26.6 28.7 31.0 33.3
35" 12.6 14.2 15.8 17.5 19.3 21.2 23.1 25.2 27.3 29.6 31.9 34.3
36" 13.0 14.6 16.2 18.0 19.8 21.8 23.6 25.9 28.1 30.4 32.8 35.3
37" 13.4 15.0 16.7 18.5 20.4 22.4 24.5 26.8 28.9 31.3 33.7 36.3
38" 13.7 15.4 17.1 19.0 20.9 23.0 25.1 27.4 29.7 32.1 34.6 37.2
39" 14.1 15.8 17.6 19.5 21.5 23.6 25.8 28.1 30.5 33.0 35.5 38.2
40" 14.5 16.2 18.1 20.0 22.1 24.2 26.5 28.8 31.3 33.8 36.5 39.2
41" 14.8 16.6 18.5 20.5 22.6 24.8 27.1 29.5 32.0 34.6 37.4 40.2
42" 15.2 17.0 19.0 21.0 23.2 25.4 27.8 30.2 32.8 35.5 38.3 41.2
43" 15.5 17.4 19.4 21.5 23.7 26.0 28.4 31.0 33.6 36.3 39.2 42.1
44" 15.9 17.8 19.9 22.0 24.3 26.6 29.1 31.7 34.4 37.2 40.1 43.1
45" 16.3 18.2 20.3 22.5 24.8 27.2 29.6 32.4 35.2 36.0 41.0 44.1




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©1996- Ken W. Watson