The new Ault-Luo ellipsoid formula allows anglers to use a simple measuring tape to get the fish’s fork length and dorsal girth (an all-around measurement of the fish’s body starting just below the dorsal fin), then view a spread sheet or Tarpon Master version 1.0 app on an iPhone to instantly find its weight.
The mathematical calculation that resulted in the model is a bit too long and complicated for the layman.
LINK (via: The Miami Herald)