The Water Resources Division's Surface Water Assessment Section oversees the protection of the quality of surface waters throughout the State of Michigan.
WEIGHT = 4.09 pounds Largemouth Bass Weight. The formula to calculate the weight for a Largemouth Bass that is 20 inches long and has a girth of 15 inches is as follows. Largemouth Bass have a shape factor of 1050. WEIGHT = LENGTH x GIRTH2 / SHAPE FACTOR. WEIGHT= 20 x (152) / 1050.
As far as I'm concerned, there are two kinds of smallmouth bass: big smallmouth, and everything else. I would categorize a big smallmouth as anything over five pounds. They fight harder, they're smarter, and they just don't come around that often (unless you happen to fish Lake Erie a lot).