This calculator requires the use of Javascript enabled and capable browsers. This script estimates the weight of a fish, based on the class of fish, specific size within class, the length and girth by measure. While this is better than just another "fish story", it is NOT a replacement for an actual accurate scale (and an honest measurement...). Many fishermen do not actually have the terms accurate and honest in their vocabularies; a fisherman's estimate of 10 pounds can actually be 2 pounds! To determine the numbers required for this estimator, measure the girth at the widest part of the body, usually at the dorsal fin. Then measure the length of the fish, in this case the "short length", which is the distance in any of the measure values from the tip of the lower jaw to the inner fork of the tail. The "long length" is the overall total length of the fish and is NOT used by this calculator. If applicable on the fish, the bill and tail are both added length that cannot be relied upon for estimating weight so scientists and sporting enthusiasts use the lower jaw as a way to be more accurate and fair in comparison estimation.
Enter the length, the girth and select a class of "general body shape" of the fish, in any of the designations; also select a specific body structure for the type fish (for example, is the body size average, large or small for the length of that specific TYPE fish, such as a bass, or salmon). If you do not know the specific body size for that specific fish, leave the selection as Average. If you do not know the girth and can't measure it, the shape selection will insert one for you. The accuracy will be better if you enter the CORRECT girth. Click on the Estimate button and the weight will be estimated in pounds and decimal fractions, grams and kilograms; each weight is independent of the others. Embellish as needed... The estimated weights are based on the classes of salt water fish; use the estimator for fresh water fish weight if needed... Please be aware that each class uses a different formula for estimation. In some classes, girth is NOT used; those classes beginning with * do not use girth!! If there are other fish you feel we should add to the estimator, please contact us.
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