What is the formula for determining the weight of a fish based on its size?
The rule of thumb for fish weights of various body types are:
Pike (length X length X length) divided by 3500
Walleye (length X length X length) divided by 2700
Bass (length X length X length) divided by 1600
Bluegill (length X length X length) divided by 1200
Another generalized formula is:
(girth X girth X length) divided by 800
All of these will result in reasonable approximations.