Wondering how much that salmon weighs and don’t have a scale?

Did you release your trophy king and wonder how much it actually weighed? In Alaska, we are often fishing without any cell service, and have no access to a Salmon weight calculator app. Fortunately, the fish length to weight formula to estimate their weight is quite easy to remember and follow!

Here’s a formula to accurately estimate the weight of a  salmon, steelhead or trout from measurements of length and girth. This king salmon length to weight conversion formula is easy to follow. The girth is measured at the thickest portion of the midsection and the length is measured from the tip of the nose to the tip of the tail. All measurements should be in inches.

Weight Estimator Formula:

Weight (lbs.) = length (in.) x girth (in.) x girth (in.) / 740

Example: A king salmon is 52 inches long and has a girth of 30.5 inches.

The calculation is as follows:

Weight = (52 x 30.5 x 30.5) / 740 = (48,373) / 740 = 65.37 lbs.

Are you interested in Kenai River salmon fishing? Book an Alaska Fishing Trip today with one of our expert Kenai River fishing guides!

Mark Glassmaker

Mark and Cindy Glassmaker have been married for 28 years, and their business, Alaska Fishing with Mark Glassmaker, has been operating since 1990. Over the past 34 years guiding on the Kenai River, we’ve witnessed many changes. Through early diversification and the dedication of our entire guide staff and team, we’ve built and maintained what we believe is the premier Kenai River fishing experience.

We take great pride in our work and in the reputation our business stands for. Your trip becomes part of that legacy, and we are committed to making it exceptional. Every outing is approached with 100% effort and service, ensuring that your Alaska fishing trips not only meets but exceeds expectations.