Fish Length Girth Formula

CaptKen · 12-26-2003, 12:08 AM

Anyone know the formula for figureing out the weight by the measurements ? My Buddy caught a whopper Tues night, He was 72" lower jaw to tail,and 52" girth, took um 45 min to get him in the boat once they caught him, then when they got home they couldnt get out of the boat up on the sea wall,They had to clean him in the boat .lol

Tim · 12-26-2003, 09:31 AM

This standard formula is just about on the money:

Weight(lbs) = (girth-in) x (girth-in) x( length-in)/800

52x52x72/800 = 243 lbs

Deans 349lb sword went :The fork length was 91 inches with a 56-inch girth.

56x56x91/800 =356lbs Not to far off.

Nevertheless, ,nice sword your buddy got.. I go by this formula quite often to avoid a late night haul to the scales. Unless I think I have something over 350lbs.

Tight Lines

CaptKen · 12-26-2003, 06:28 PM

Im gonna write that down and keep it in my wallet. Does it work for any fish ? or is that a swordie formula ?

Tim · 12-26-2003, 06:43 PM

It works for many species of fish, but many fish require a different number to divide by. You have to catch one and weigh it to figure out the correct denominator of the equation.

Ya, its alot easier than making that 5am run to the scales.

TIght Lines

Mike · 12-27-2003, 03:03 PM

Ya, thats pretty much right on the money with the denominator of 800. Although you may run into a porky sword one day that screws with the formula.

the weather looks great for the week of new years.. im going to try to get out just about everynight to test out some new products.

I will also be emailing a select few of you guys to test our upcoming products and give us some results on.

Tight Lines
MIke

CaptKen · 12-27-2003, 04:12 PM

My Buddy Mikes first Sword, He went with Me on a few dry runs,then on Tues night he decided to go on his own with one of his buddys to try and break the bad luck streak. And SHAZAM ! His bad luck streak with me is over ! He got his First one, Now Hes hooked like a bad drug , His girlfriend probably hates me, Another Swordfish Junkie !

hannaman · 01-08-2004, 08:47 AM

Tim, That formula is right on the money. The sword we caught on our last trip, shown in the new gallery was 71 inches long and had a 41 inch girth. 41x41= 1681 x 71 = 119351 divided by 800 = 149.18 pounds

Mike · 01-08-2004, 11:28 AM

Quote:

Originally Posted by hannaman

Tim, That formula is right on the money. The sword we caught on our last trip, shown in the new gallery was 71 inches long and had a 41 inch girth. 41x41= 1681 x 71 = 119351 divided by 800 = 149.18 pounds

Indeed.. the formula is very accurate when it comes to swordfish.

Cary.. your fish is a hog!

Ron.38 Special · 01-08-2004, 04:16 PM

Our 407 was 96" and 56" girth.

Formula says 376, but we know the scale is right, its the same one Dean used but the 56" girth was the same for a good part of the fish until the tail.

ProfessorO · 01-09-2004, 09:37 AM

Because of natural variabilty, a "spread" of + and -10% is usually
associatedwith that formula. Full vrs empty stomach can be as much a
s 5-10lbs. Ron, you caught a phatty, a statistical outlier! cheers, arthur

CaptKen · 06-13-2004, 05:50 PM

Here ya go Mike

Anonymous · 06-13-2004, 06:43 PM

The lenght X (girth)2
_____________
800
works on most species, but swordfish can vary from long and skinny to short and extremely fat. I think that it will stii give you a ballpark idea of how big the fish may have been.

mlutz95 · 10-30-2007, 09:41 PM

here's a website that i use to calculate the fish's weight.

Salt Water Fish Weight Calculator

12-26-2003, 12:08 AM	#1 (permalink)
CaptKen Hooked Up Join Date: May 2004 Location: Sunrise/Dania Fla. Occupation: Power Plant Control Room Operator Posts: 830	Fish Length Girth Formula Anyone know the formula for figureing out the weight by the measurements ? My Buddy caught a whopper Tues night, He was 72" lower jaw to tail,and 52" girth, took um 45 min to get him in the boat once they caught him, then when they got home they couldnt get out of the boat up on the sea wall,They had to clean him in the boat .lol

12-26-2003, 06:28 PM	#3 (permalink)
CaptKen Hooked Up Join Date: May 2004 Location: Sunrise/Dania Fla. Occupation: Power Plant Control Room Operator Posts: 830	Thanks Tim Im gonna write that down and keep it in my wallet. Does it work for any fish ? or is that a swordie formula ?

12-27-2003, 03:03 PM	#5 (permalink)
Mike Grander Join Date: May 2004 Location: Fort Lauderdale, FL Boat: Coming Soon! Best Catch: 250lb Swordfish Posts: 1,296	Ya, thats pretty much right on the money with the denominator of 800. Although you may run into a porky sword one day that screws with the formula. the weather looks great for the week of new years.. im going to try to get out just about everynight to test out some new products. I will also be emailing a select few of you guys to test our upcoming products and give us some results on. Tight Lines MIke __________________ Fishing Reports

12-27-2003, 04:12 PM	#6 (permalink)
CaptKen Hooked Up Join Date: May 2004 Location: Sunrise/Dania Fla. Occupation: Power Plant Control Room Operator Posts: 830	Mikes Sword My Buddy Mikes first Sword, He went with Me on a few dry runs,then on Tues night he decided to go on his own with one of his buddys to try and break the bad luck streak. And SHAZAM ! His bad luck streak with me is over ! He got his First one, Now Hes hooked like a bad drug , His girlfriend probably hates me, Another Swordfish Junkie !

10-30-2007, 09:41 PM	#13 (permalink)
mlutz95 Hooked Up Join Date: Oct 2007 Location: dallas Best Catch: billfish slam Occupation: student (8th grade) Posts: 172	website calculator here's a website that i use to calculate the fish's weight. Salt Water Fish Weight Calculator

12-26-2003, 09:31 AM	#2 (permalink)
Tim Lines In Join Date: May 2004 Posts: 77	This standard formula is just about on the money: Weight(lbs) = (girth-in) x (girth-in) x( length-in)/800 52x52x72/800 = 243 lbs Deans 349lb sword went :The fork length was 91 inches with a 56-inch girth. 56x56x91/800 =356lbs Not to far off. Nevertheless, ,nice sword your buddy got.. I go by this formula quite often to avoid a late night haul to the scales. Unless I think I have something over 350lbs. Tight Lines

12-26-2003, 06:43 PM	#4 (permalink)
Tim Lines In Join Date: May 2004 Posts: 77	It works for many species of fish, but many fish require a different number to divide by. You have to catch one and weigh it to figure out the correct denominator of the equation. Ya, its alot easier than making that 5am run to the scales. TIght Lines

01-08-2004, 08:47 AM	#7 (permalink)
hannaman Charter Captain Join Date: May 2004 Location: Ft. Lauderdale, Florida Boat: 32 Donzi w/ twins Best Catch: 300+ pound Swordfish club, still. Occupation: Charter Boat Captain Posts: 672	Tim, That formula is right on the money. The sword we caught on our last trip, shown in the new gallery was 71 inches long and had a 41 inch girth. 41x41= 1681 x 71 = 119351 divided by 800 = 149.18 pounds

01-08-2004, 04:16 PM	#9 (permalink)
Ron.38 Special Hooked Up Join Date: May 2004 Posts: 217	Our 407 was 96" and 56" girth. Formula says 376, but we know the scale is right, its the same one Dean used but the 56" girth was the same for a good part of the fish until the tail.

01-09-2004, 09:37 AM	#10 (permalink)
ProfessorO Hooked Up Join Date: May 2004 Location: Hollywood, FL Boat: Wellcraft 270 Coastal Best Catch: All of them Occupation: Professor of Physical Oceanography Posts: 472	Because of natural variabilty, a "spread" of + and -10% is usually associatedwith that formula. Full vrs empty stomach can be as much a s 5-10lbs. Ron, you caught a phatty, a statistical outlier! cheers, arthur

06-13-2004, 05:50 PM	#11 (permalink)
CaptKen Hooked Up Join Date: May 2004 Location: Sunrise/Dania Fla. Occupation: Power Plant Control Room Operator Posts: 830	Here ya go Mike

06-13-2004, 06:43 PM	#12 (permalink)
Anonymous Grunt Join Date: May 2004 Posts: 0	The lenght X (girth)2 _____________ 800 works on most species, but swordfish can vary from long and skinny to short and extremely fat. I think that it will stii give you a ballpark idea of how big the fish may have been.

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