Fish Biologists have collected vast quantities of length and weight data from a variety of fish species. This has enabled length and weight relationships to be calculated for some fish species which can be used to estimate weight of a fish by measuring its length. Please note that these figures are estimates only and individual fish weight will vary depending on age, sex, season and recent feeding activity.
In some of the conversion tables, fork length measurements have been used while in others, total length has been used.
Fork length is measured from the snout to the fork of the tail.
Total length (legal length) is measured from the snout to the tip of the tail.
Please note: The following table has fork length measurements.
Fork Length (cm) | Weight (kg) | Fork Length (cm) | Weight (kg) |
---|---|---|---|
25 | 0.4 | 48 | 2.7 |
26 | 0.4 | 49 | 2.9 |
27 | 0.5 | 50 | 3.1 |
28 | 0.5 | 51 | 3.2 |
29 | 0.6 | 52 | 3.4 |
30 | 0.7 | 53 | 3.6 |
31 | 0.7 | 54 | 3.8 |
32 | 0.8 | 55 | 4.1 |
33 | 0.9 | 56 | 4.3 |
34 | 1.0 | 57 | 4.5 |
35 | 1.0 | 58 | 4.8 |
36 | 1.1 | 59 | 5.1 |
37 | 1.2 | 60 | 5.3 |
38 | 1.3 | 61 | 5.5 |
39 | 1.5 | 62 | 5.8 |
40 | 1.6 | 63 | 6.1 |
41 | 1.7 | 64 | 6.4 |
42 | 1.8 | 65 | 6.7 |
43 | 1.9 | 66 | 7.1 |
44 | 2.1 | 67 | 7.3 |
45 | 2.2 | 68 | 7.7 |
46 | 2.4 | 69 | 8.0 |
47 | 2.5 | 70 | 8.4 |
Reference: Steffe, A.S., Murphy, J.J., Chapman, D.J., Tarlinton, B.E. and Grinberg, A. 1996. An assessment of the impact of offshore recreational fishing in NSW waters on the management of commercial fisheries. FRDC Project no. 94/053. Publishers, Fisheries Research Institute, NSW Fisheries. 139pp.
Please note: The following table has fork length measurements.
Fork Length (cm) | Weight (kg) | Fork Length (cm) | Weight (kg) |
---|---|---|---|
60 | 2.8 | 94 | 10.6 |
61 | 2.9 | 96 | 11.3 |
62 | 3.0 | 98 | 12.0 |
63 | 3.2 | 100 | 12.8 |
64 | 3.4 | 105 | 14.8 |
65 | 3.5 | 110 | 17.0 |
66 | 3.7 | 115 | 19.4 |
67 | 3.8 | 120 | 22.0 |
68 | 4.0 | 125 | 24.9 |
69 | 4.2 | 130 | 28.0 |
70 | 4.4 | 135 | 31.4 |
71 | 4.6 | 140 | 35.0 |
72 | 4.8 | 145 | 38.9 |
73 | 5.0 | 150 | 43.0 |
74 | 5.2 | 155 | 47.5 |
76 | 5.6 | 160 | 52.0 |
78 | 6.1 | 165 | 57.3 |
80 | 6.5 | 170 | 62.6 |
82 | 7.0 | 175 | 68.3 |
84 | 7.6 | 180 | 74.3 |
86 | 8.1 | 185 | 80.7 |
88 | 8.7 | 190 | 87.4 |
90 | 9.3 | 195 | 94.5 |
92 | 9.9 | 200 | 101.9 |
Reference: Stewart, J., D. J. Ferrell, B. van der Walt, D. Johnson,and M. Lowry. 2002. Assessment of length and age composition of commercial kingfish landings. Final report to the Fisheries Research and Development Corporation, Project No. 97/126. NSW Fisheries, Cronulla.
Please note: The following table has fork length measurements.
Fork Length (cm) | Weight (kg) | Fork Length (cm) | Weight (kg) |
---|---|---|---|
30 | 0.6 | 62 | 4.5 |
31 | 0.7 | 64 | 4.9 |
32 | 0.7 | 66 | 5.4 |
33 | 0.8 | 68 | 5.8 |
34 | 0.9 | 70 | 6.3 |
35 | 0.9 | 72 | 6.9 |
36 | 1.0 | 74 | 7.4 |
37 | 1.1 | 76 | 8.0 |
38 | 1.2 | 78 | 8.6 |
39 | 1.3 | 80 | 9.2 |
40 | 1.3 | 82 | 9.8 |
42 | 1.5 | 84 | 10.5 |
44 | 1.7 | 86 | 11.2 |
46 | 2.0 | 88 | 12.0 |
48 | 2.2 | 90 | 12.7 |
50 | 2.5 | 92 | 13.5 |
52 | 2.8 | 94 | 14.4 |
54 | 3.1 | 96 | 15.2 |
56 | 3.4 | 98 | 16.1 |
58 | 3.8 | 100 | 17.1 |
60 | 4.1 |
Reference: Moran M. J. and C. Burton. 1990. Relationships among partial and whole lengths and weights for Western Australian pink snapper Chrysophys auratus ( Sparidae). Fisheries Department of Western Australia, Fisheries Research Report No. 89.
Please note: The following table has total length measurements.
Total Length (cm) | Weight (kg) | Total Length (cm) | Weight (kg) |
---|---|---|---|
45 | 1.0 | 112 | 14.4 |
46 | 1.1 | 116 | 16.0 |
48 | 1.2 | 120 | 17.6 |
50 | 1.3 | 124 | 19.4 |
52 | 1.5 | 128 | 21.4 |
54 | 1.7 | 130 | 22.3 |
56 | 1.9 | 135 | 24.9 |
58 | 2.1 | 140 | 27.7 |
60 | 2.3 | 145 | 30.8 |
64 | 2.8 | 150 | 34.0 |
68 | 3.3 | 155 | 37.4 |
72 | 3.9 | 160 | 41.1 |
76 | 4.6 | 165 | 45.0 |
80 | 5.4 | 170 | 49.1 |
84 | 6.2 | 175 | 53.5 |
88 | 7.1 | 180 | 58.1 |
92 | 8.1 | 185 | 63.0 |
96 | 9.2 | 190 | 68.1 |
100 | 10.3 | 195 | 73.5 |
104 | 11.6 | 200 | 79.2 |
108 | 12.9 |
Please note: The following table has total length measurements.
Total Length (cm) | Weight (kg) | Total Length (cm) | Weight (kg) |
---|---|---|---|
36 | 0.3 | 72 | 2.7 |
37 | 0.3 | 74 | 2.9 |
38 | 0.3 | 76 | 3.2 |
39 | 0.4 | 78 | 3.5 |
40 | 0.4 | 80 | 3.8 |
41 | 0.4 | 82 | 4.1 |
42 | 0.5 | 84 | 4.4 |
43 | 0.5 | 86 | 4.8 |
44 | 0.6 | 88 | 5.1 |
45 | 0.6 | 90 | 5.5 |
46 | 0.6 | 92 | 5.9 |
47 | 0.7 | 94 | 6.4 |
48 | 0.7 | 96 | 6.8 |
49 | 0.8 | 98 | 7.3 |
50 | 0.8 | 100 | 7.8 |
52 | 0.9 | 105 | 9.1 |
54 | 1.1 | 110 | 10.6 |
56 | 1.2 | 115 | 12.2 |
58 | 1.3 | 120 | 14.0 |
60 | 1.5 | 125 | 15.9 |
62 | 1.7 | 130 | 18.1 |
64 | 1.8 | 135 | 20.4 |
66 | 2.0 | 140 | 23.0 |
68 | 2.2 | 145 | 25.7 |
70 | 2.5 | 150 | 28.7 |
Reference: Steffe, A.S., Murphy, J.J., Chapman, D.J., Tarlinton, B.E. and Grinberg, A. 1996. An assessment of the impact of offshore recreational fishing in NSW waters on the management of commercial fisheries. FRDC Project no. 94/053. Publishers, Fisheries Research Institute, NSW Fisheries. 139pp.
Please note: The following table has fork length measurements.
Fork Length (cm) | Weight (kg) | Fork Length (cm) | Weight (kg) |
---|---|---|---|
25 | 0.3 | 43 | 1.6 |
26 | 0.3 | 44 | 1.7 |
27 | 0.4 | 45 | 1.8 |
28 | 0.4 | 46 | 1.9 |
29 | 0.5 | 47 | 2.0 |
30 | 0.5 | 48 | 2.2 |
31 | 0.6 | 49 | 2.3 |
32 | 0.6 | 50 | 2.5 |
33 | 0.7 | 51 | 2.6 |
34 | 0.8 | 52 | 2.8 |
35 | 0.8 | 53 | 2.9 |
36 | 0.9 | 54 | 3.1 |
37 | 1.0 | 55 | 3.3 |
38 | 1.1 | 56 | 3.5 |
39 | 1.2 | 57 | 3.7 |
40 | 1.3 | 58 | 3.9 |
41 | 1.3 | 59 | 4.1 |
42 | 1.5 | 60 | 4.3 |
Reference: Harris, J. H. 1987. Growth of Australian bass, Macquaria novemaculeata (Perciformes, Percichthyidae), in the Sydney basin. Australian Journal of Marine and Freshwater Research 38:351-361.
Please note: The following table has total length measurements.
Total Length (cm) | Weight (kg) | Total Length (cm) | Weight (kg) |
---|---|---|---|
40 | 1.1 | 72 | 7.6 |
42 | 1.3 | 74 | 8.3 |
44 | 1.5 | 76 | 9.0 |
46 | 1.8 | 78 | 9.8 |
48 | 2.0 | 80 | 10.7 |
50 | 2.3 | 82 | 11.6 |
52 | 2.6 | 84 | 12.5 |
54 | 3.0 | 86 | 13.5 |
56 | 3.3 | 88 | 14.6 |
58 | 3.7 | 90 | 15.7 |
60 | 4.2 | 92 | 16.8 |
62 | 4.6 | 94 | 18.0 |
64 | 5.2 | 96 | 19.3 |
66 | 5.7 | 98 | 20.7 |
68 | 6.3 | 100 | 22.1 |
70 | 6.9 |
Please note: The following table has fork length measurements.
Fork length(cm) | Weight (kg) | Fork length(cm) | Weight (kg) |
---|---|---|---|
25 | 0.1 | 38 | 0.4 |
26 | 0.1 | 39 | 0.5 |
27 | 0.2 | 40 | 0.5 |
28 | 0.2 | 41 | 0.5 |
29 | 0.2 | 42 | 0.6 |
30 | 0.2 | 43 | 0.6 |
31 | 0.2 | 44 | 0.7 |
32 | 0.3 | 45 | 0.7 |
33 | 0.3 | 46 | 0.8 |
34 | 0.3 | 47 | 0.8 |
35 | 0.3 | 48 | 0.9 |
36 | 0.4 | 49 | 0.9 |
37 | 0.4 | 50 | 1.0 |
Please note: The following table has fork length measurements.
Fork length(cm) | Weight (kg) | Fork length(cm) | Weight (kg) |
---|---|---|---|
30 | 0.3 | 56 | 2.5 |
32 | 0.4 | 58 | 2.8 |
34 | 0.5 | 60 | 3.0 |
36 | 0.6 | 62 | 3.4 |
38 | 0.7 | 64 | 3.8 |
40 | 0.9 | 66 | 4.2 |
42 | 1.0 | 68 | 4.6 |
44 | 1.2 | 70 | 5.0 |
46 | 1.3 | 72 | 5.5 |
48 | 1.5 | 74 | 6.0 |
50 | 1.7 | 76 | 6.5 |
52 | 1.9 | 78 | 7.1 |
54 | 2.2 | 80 | 7.7 |
Please note: The following table has fork length measurements.
Fork length(cm) | Weight (kg) | Fork length(cm) | Weight (kg) |
---|---|---|---|
30 | 0.4 | 41 | 1.2 |
31 | 0.5 | 42 | 1.3 |
32 | 0.5 | 43 | 1.4 |
33 | 0.6 | 44 | 1.5 |
34 | 0.7 | 45 | 1.6 |
35 | 0.7 | 46 | 1.7 |
36 | 0.8 | 47 | 2.0 |
37 | 0.9 | 48 | 2.2 |
38 | 1.0 | 49 | 2.5 |
39 | 1.0 | 50 | 2.6 |
40 | 1.1 | 51 | 2.8 |
Please note: The following table has fork length measurements.
Fork length(cm) | Weight (kg) | Fork length(cm) | Weight (kg) |
---|---|---|---|
27 | 0.3 | 51 | 1.8 |
29 | 0.3 | 53 | 2.0 |
31 | 0.4 | 55 | 2.3 |
33 | 0.5 | 57 | 2.5 |
35 | 0.6 | 59 | 2.8 |
37 | 0.7 | 61 | 3.1 |
39 | 0.8 | 63 | 3.4 |
41 | 0.9 | 65 | 3.7 |
43 | 1.1 | 67 | 4.1 |
45 | 1.2 | 69 | 4.4 |
47 | 1.4 | 71 | 4.8 |
49 | 1.6 | 73 | 5.3 |