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15<br />

Converting fish lengths to weights<br />

Converting fish lengths to weights<br />

Fish biologists have collected vast quantities<br />

of length and weight data from a variety of fish<br />

species. This has enabled length and weight<br />

relationships to be calculated for some fish<br />

species which can be used to estimate the<br />

weight of a fish by measuring its length.<br />

Please note that these figures are estimates<br />

only and individual fish weight may vary<br />

depending on age, sex, season and recent<br />

feeding activity.<br />

Australian Bass<br />

Total length used for both legal length<br />

measurement and weight calculation.<br />

NSW Recreational Freshwater Fishing Guide<br />

Total<br />

length<br />

(cm)<br />

Weight<br />

(kg)<br />

Total<br />

length<br />

(cm)<br />

25 0.3 43 1.5<br />

26 0.3 44 1.6<br />

27 0.4 45 1.8<br />

28 0.4 46 1.9<br />

29 0.4 47 2.1<br />

30 0.5 48 2.2<br />

31 0.6 49 2.4<br />

32 0.6 50 2.5<br />

33 0.7 51 2.7<br />

34 0.8 52 2.9<br />

35 0.8 53 2.9<br />

36 0.9 54 3.0<br />

37 1.0 55 3.2<br />

38 1.1 56 3.4<br />

39 1.1 57 3.7<br />

40 1.2 58 3.9<br />

41 1.3 59 4.1<br />

Weight<br />

(kg)<br />

42 1.4 60 4.3

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