I caught an episode of Fishing with Roland Martin the other day... which by the way is only about 10 min of fishing and 20 min plugging BPS and Triton boats.  Anyway he was fishing off shore for giant grouper, and he used a formula to figure out the weight of the fish by multiplying the Length x girth x girth / 800.  Is there a formula like this for bass or other gamefish?

http://bassresource.com/bassfishing/fishcalculator.html

Thanks Jake, but do you know if there is a formula like he was using?

For bass it's Length² x Girth ÷ 1,200 = weight.

 As far as the girth goes, have heard 2 places. Right behind small swim fins on sides or at largest point of girth. One would make a lot of difference over the other. Which ones correct?

                                As Ever,

                                 skillet

Largest point of girth.

girth?

do you mean garth?  

oh, and as far as using the formula to estimate the weight of the bass, my experience is that your guess is as good.  

Get a good scale.  No serious basser should leave home without one.

also... when you get your final answer, multiply it by two or three

Roland has always been known to multiply his final weight  by 2 or 3 or 10.

Roland has always been known to multiply his final weight by 2 or 3 or 10.

Yup... Wow folks look at this beautiful bass I would say about 5 pounds

2 sentences later, Well the BogaGrip says 7 pounds!

Final Sentence, Lets release another beautiful 10 pound Florida bass.

Roland has always been known to multiply his final weight by 2 or 3 or 10.

Yup... Wow folks look at this beautiful bass I would say about 5 pounds

2 sentences later, Well the BogaGrip says 7 pounds!

Final Sentence, Lets release another beautiful 10 pound Florida bass.

SON!!! IT'S A GIANT, IT'S A GIANT. YES!!! I GOT 'ER. NOW THAT IS A TROPHY, TROPHY BASS RIGHT THERE BOYS. SO COME ON TO LAKE OKECHOBEE AND MAYBE YOU CAN GET A MONSTER LIKE THIS TOO. WELL THAT'S ALL THE TIME WE HAVE FOLKS. WE'LL SEE YA NEXT WEEK. WHAT A FISH............

he's the great american fisherman. he'll fish anywhere........................... ;D

i agree with avid. no substitute for a good scale. seems like the minute folks find out someone guessed or estimated the weight of a fish, they lose all credibility no matter whether they were close or not. there is even a disclaimer on the weight calculator above.

but based on comparisons of various "weight formulas" to actual readings on my digital scale, i'd have to say that length x length x girth / 1200 is the most acurate one i've found.

but i hate math. it's just easier to buy a scale. ;D

Roland has always been known to multiply his final weight by 2 or 3 or 10.

Yup... Wow folks look at this beautiful bass I would say about 5 pounds

2 sentences later, Well the BogaGrip says 7 pounds!

Final Sentence, Lets release another beautiful 10 pound Florida bass.

2 funny!

LOL... He was using a calculator in this particular episode, but he didn't mention the brand.  It was a pleasant surprise.  Hahaha...