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How to Calculate Length & Weight for Salmon

Fisherpersons who practice catch-and-release fishing often want to know the weights of the fish they release. Because reliable scales for weighing the fish before release usually are not practical, you can use a formula based on the fish's length to estimate its weight. Calculate length and weight for salmon using the Sturdy Scale before you release your catch to get an idea of the size of the fish you let get away.

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  1. Measure the salmon fish with the tape measure from the tip of the fish's nose to the middle of the fish's tail where it curves inward. Measure the girth of the salmon immediately in front of the fish's dorsal fin.

  2. Square the girth measurement. Multiply the length by 1.3333.

  3. Multiply both products from the previous step together and divide the product by 800 to get a weight estimate.

  4. Tip

    Edward Sturdy created this weight scale and equation based on salmon fish from the Vosso river system in Norway.

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Things You'll Need

  • Tape measure
  • Calculator

About the Author

Kathryn Hatter is a veteran home-school educator, as well as an accomplished gardener, quilter, crocheter, cook, decorator and digital graphics creator. As a regular contributor to Natural News, many of Hatter's Internet publications focus on natural health and parenting. Hatter has also had publication on home improvement websites such as Redbeacon.

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