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.
Following are standard weights based on the formula for largemouth bass. The weights given are for fish in âabove averageâ body condition. Fish weights are often variable for a given length, so you can make a judgment about how fat your fish is and make an adjustment. 12.0.