Accuracy of the Fish Weight Calculator?

[Topwater_Popper]

How accurate is the fish weight calculator that is on this web site?  Do you need to subtract a few pounds or add a few pounds?  I do not own a scale mysel, so I would like to know the ability of the calculator.  Thanks.

Topwater Popper

[senko_77]

on my big fish, my x-tools said 14.9, and the fish weight mesurments said 14.7.  so i am guessin pretty dern accuarate

[Mattlures]

Most calculators are good for small to big but are poor for realy huge bass. I am suprised that it was so close to your 14. once you get over 16 the caculators are usualy off by pounds not ounces

[senko_77]

does that have to do with how distorted the girth of a huge fish can get??

[KenDammit28]

It can be pretty accurate...its more of a baseline, in my opinion..but I haven't really looked into how the formula came about or anything like that.

[KU_Bassmaster.]

According to the weight calculator my PB weighed in at about 11 lbs.  According to my Berkeley digital scale I had at the time ..... 10 lbs. 8 oz.  You look at some of those Texas Share-a-Lunkers ..... the weight calculator is way off.

So my opinion is it's a descent estimate, but not accurate.

[George Welcome]

Optional weight estimate based on TL*TL*G/1200:                              10.6

     (Rough estimate for torpedo shaped fish like bass)                        

Optional weight estimate based on TL*TL*G/1000:                              12.8

     (Rough "California" estimate for full-bodied fish like gravid bass)                        

Optional weight estimated based on TL*G*G/800:                              10.3

     (Rough estimate for bass, per Outdoor Life and Hal Schramm)                        

The above are based on a length of 27 and a girth of 17.5. From this centerpoint of approximately 10 pounds, the formulae wander grossly.

The simple solution if you wish to know the weight of a fish is to get a scale.

Log (weight in grams)= -4.83 + 1.923 x Log (total length in millimeters) + 1.157 x Log (girth in millimeters). This is the formula used by Florida Fisheries Biologists with adjustments made for abnormal shape.

[FALCON]

IT'S BEEN FAIRLY CLOSE ON THE FISH I'VE CHECKED. NOT PERFECT BUT CLOSE.

[Glenn]

... and that's exactly how it's designed - to give you a close ballpark figure.  Due to endless variations, it's impossible to be dead-on accurate.  

[Raul]

The variation between what the weight calculator says and the actual weight is minimal, so you can trust it.

It 's a whole lot better than the eyeballmeter for shure.  

[roadwarrior]

It makes it a lot harder to catch 7 or 8 lb bass, that's for sure.

[bassmasta7]

I would just fork over $7 and get a bass pro 50lb scale.

[Guest avid]

The variation between what the weight calculator says and the actual weight is minimal, so you can trust it.

It 's a whole lot better than the eyeballmeter for shure.

Yeah, but using the eyeball meter always gives you bigger fish   ;D