Fishing ... WarmWater Fish Weight Formulas by Length PDF Print E-mail
Tidbits

Listed below are formulas for determining the approximate
weight for warm-water fish based on its length.

Largemouth & Smallmouth Bass

(length x length x length) divided by 1600
Bluegill (length x length x length) divided by 1200
Northern Pike (length x length x length) divided by 3500
Walleye (length x length x length) divided by 2700
Generalized Formula (girth x girth x length) divided by 800


Largemouth & Smallmouth Bass Length to Weight Conversion Chart
(Grith is also a factor and can vary the weight by as much as a half pound.
However, the chart will give you a fair estimate of the weight of the fish.
)

Length (inches) Weight (pounds)   Length (inches) Weight (pounds)
10.0 .63   17.5 3.35
10.5 .72   18.0 3.64
11.0 .83   18.5 3.95
11.5 .95   19.0 4.28
12.0 1.08   19.5 4.63
12.5 1.22   20.0 5.00
13.0 1.37   20.5 5.38
13.5 1.53   21.0 5.78
14.0 1.71   21.5 6.21
14.5 1.90   22.0 6.65
15.0 2.10   22.5 7.11
15.5 2.32   23.0 7.60
16.0 2.56   23.5 8.11
16.5 2.80   24.0 8.64
17.0 3.07   24.5 9.19
 
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