The algorithm used is W = (L * (G^2))/R, where:
W = Weight in decimal pounds
L = Length in inches (maximum of 240
inches)
G = Girth in inches [maximum of 140 inches (default is .58 * L)] and
typically for a Large Mouth Bass the girth would be around .75 * L.
R
= 775 for a Salmon/Steelhead, 625 for a Halibut, 1075 for a Sturgeon, and 800 for Large Mouth Bass
(Note: The calculations for Salmon/Steelhead have been taken from multiple sources; for Halibut it is an approximation
from a study from the International Pacific Halibut Commission, for the Sturgeon it comes from a BC Fraser River White
Sturgeon study program, and for the Large Mouth Bass it comes from the Florida Fish & Wildlife Conservation Commission.)
*Salmon/Steelhead Weight Table