George the standard estimator is :
L X G X G / 800 this is used on many game fish :
another used for LMB is
L X L X G / 1000 (link says 1200 ?) it accounts for more streamline LMB the peruse pelagic fish like TShad
I use both and average.
Appreciate the familiar length/girth measuement calculations but this was a handy quick and dirty download program to click on the species, enter length and weight would be displayed.
Reasonable RW comparison - I found it quite useful -sorry I lost it.
