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Topwater_Popper

Accuracy of the Fish Weight Calculator?

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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

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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

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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

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

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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.

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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.

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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.

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... 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.  

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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.  ;)

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

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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

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