Caught a good fish ? – Want to know what it weighs ?
Forget the spring balance – just measure its total length !
The calculators are based on 1000’s of observations made by a variety of scientific bodies over the past three decades or so, however, if anyone has any historic accurate records of weight / length for any species, they could be very useful in refining the models – please use the form at the bottom of the page.
Though there is no doubt that fish can have different weights for the same length dependent on several factors – whether they are gravid, post spawning, sick or healthy, have good access to food-stocks etc., weight estimation based on a fish’s length offers a credible alternative to the spring balances typically in use by anglers as any in-accuracies will be the same for everyone.
With the increased vulnerability of many of the species we are interested in catching, unless keeping a fish for the table, it makes sense to do everything in our power to return it with the minimum of handling and as fast as possible.