Answer: Fish are sometimes damaged when weighed. Using the appropriate formula for your species below, you can quickly calculate the "approximate" weight of your fish by using a ruler. You may also wish to download our trophy converter [PDF 68KB] in which we've done the math for you.
Please note when using the formulas:
length and girth are measured in inches,
girth is the distance around the body of the fish at its largest point, and
all answers are in pounds
To measure your fish:
A = length and B = girth
Formulas
bass weight = (length x length x girth) / 1,200
pike weight = (length x length x length) / 3,500
sunfish weight = (length x length x length) / 1,200
trout weight = (length x girth x girth) / 800
walleye weight = (length x length x length) / 2,700
For example, you catch a 16 inch walleye. Using the formula for walleye above: (16 x 16 x 16) / 2,700 = 1.5 pounds. Your walleye would weigh approximately 1.5 pounds
HOW TO
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Description
How to estimate fish weight
by 10.5" RES Sharon
Oct 30, 2010
Estimating fish weight:
Can you tell me how much my fish weighs?
Answer: Fish are sometimes damaged when weighed. Using the appropriate formula for your species below, you can quickly calculate the "approximate" weight of your fish by using a ruler. You may also wish to download our trophy converter [PDF 68KB] in which we've done the math for you.
Please note when using the formulas:
To measure your fish:
A = length and B = girth
Formulas
bass weight = (length x length x girth) / 1,200
pike weight = (length x length x length) / 3,500
sunfish weight = (length x length x length) / 1,200
trout weight = (length x girth x girth) / 800
walleye weight = (length x length x length) / 2,700
For example, you catch a 16 inch walleye. Using the formula for walleye above: (16 x 16 x 16) / 2,700 = 1.5 pounds. Your walleye would weigh approximately 1.5 pounds