http://www.sportales.com/Fishing/A-Trick-to-Estimatecalculate-the-Weight-of-a-Fish-Based-on-Length-and-Girth-also-Known-as-the-Girth-Method800-Method.96071 Discussion about: A Trick to Estimate/calculate the Weight of a Fish Based on Length and Girth (also Known as the Girth Method/800 Method)