Enter total length of your fish in inches.
Enter girth/circumference of fish.
this is measured just in front of the dorsal fin.
Approximate weight of your fish is
This calculation is based on what the Department of Fish and Wildlife uses.
There are numerous calculations on getting the approximate weight of your
Steelhead, Trout or Salmon. Formulas such as girth cubed divided by 2300 or
length x girth squared divided by 800 or 775 are all valid and can give
you basically the same results, plus or minus a few lbs.