We have seen a bunch of charts that convert walleye or pike from their length to their weight.  They are all pretty similar, but of course a fish can also vary by the girth of the body so a 36 inch pike might be a couple more or a couple less pounds.  These lengths and weights in the conversion chart below are based on averages that we have found.  For example, the Saskatchewan Department of the Environment encourages the use of “weigh your fish with a ruler”.  It’s quicker and easier on a fish to just measure it rather than the extra handling and extra time out of water it takes to hook on a scale.

Formulas containing length as well as girth are often most accurate for estimating weight, because the fatness or plumpness of the fish is accounted for. If only length is available, the most accurate weights often are estimated from length-weight relationships for specific waters or regions. For instance, in some waters fish might be relatively “skinny,” and the weight estimate might be overinflated if based on a formula created from data on a water body where fish are “fat” or even “normal.” That’s why adding girth to the formula can help with accuracy.

 Formula’s containing girth, however, also may not be as accurate as we’d like, because of inherent differences in the shape of fish and finding the right adjustment factor (or “shape” factor) to use in the formula. And it’s important to measure girth carefully, and at the fish’s fattest point, as girth estimates affect weight estimates powerfully.

The Basics

Walleyes develop at very different rates depending on their gender. Their lifespan is also radically different as well. On top of that, certain factors, such as the environment and where they are located can also have a significant impact on growth rates.

Age


•1 – In their first year, a walleye will grow to around 13cm (5”) and weigh just .2 lbs. The males will be slightly bigger and will continue to be for several years.
•2 – Generally, the walleye will be at about 20cm (8”) in its second year of life. It will weigh slightly less than half a pound.
•3 – At this point the male walleye will be considered mature and will be about 26cm in length. They will weigh about .6lb.
•4 – This is the age in which female walleye will begin to outpace males in terms of size. On average, the walleye will weigh just shy of a pound and be 31cm (12.3”) in length.
•5 – At age 5, female walleye are considered mature and continue to grow more than the males. The average weight of a 5 year old walleye is a pound and in terms of length they will reach about 36cm (14.2”).
•10 – When they reach age 10, walleye will typically weigh about 2.6lbs. and will be about 49cm (19.1cm) long.
•15 – In terms of length, a 15 year old walleye will be about 58cm (23”). For weight, they will be 4.5 pounds.
•20 – At this point, the walleye population will be mostly female. They will weigh about 6.7 lbs. and be around 66cm (26.2”) in length.
•25 – For those walleye that live this long, the average weightis 9.4 lbs. and the average length is 74cm (29”).

Life Expectancy

Typically, your average male walleye will live anywhere between 15-20 years. Female walleyes live significantly longer than males. In fact, if left alone, the average female walleye will live for around 25 years, possibly longer. The oldest recorded walleye was 29 years old, weighed 25 lbs., and was 107 cm (42”) long.

Interesting Facts

The name“walleye” comes from the fact that the fish’s eyes stare off in opposite directions, as if just staring at walls. While on the subject of their eyes, they can only see in shades of red and green. This is because they lack blue and yellow pigments in their eyes.

There is a misconception that light hurts walleyes. In fact, walleyes simply favor low light situations because it makes it easier for them to hunt. While female walleye will produce less eggs the bigger they get, the eggs of larger walleye are more resilient and likely to actually hatch. It isn’t known whether they can reach a point whether they are unable to produce eggs anymore.

Walleye Weight Formula

The formula to calculate the weight for a Walleye that is 20 inches long and has a girth of 12 inches is as follows. Walleye have a shape factor of 750.

WEIGHT = LENGTH x GIRTH2 / SHAPE FACTOR

WEIGHT= 20 x (122) / 750
WEIGHT= 20 x 144 / 750
WEIGHT= 2880 / 750
WEIGHT = 3.84 pounds (This would be a very fat Walleye)

How Long Is A 5 Year Old Walleye?

-For both Walleye and Northern Pike the best age for eating are 5-9 year old fish because of the fillet size, quality of meat, and superior taste. For Walleye this means about 14”-18” and for Northern Pike in between 24”-30”.

How Old Is A 6 Inch Walleye?

Having only caught one 30 inch walleye myself, I couldn’t help but wonder how many years it took for that fish to get so big….Average Walleye Length vs. Age.

What Is The Biggest Walleye Ever Caught?

25 pounds
The largest walleye ever taken weighed 25 pounds and was caught in 1960 on Old Hickory Lake in Tennessee, according to the International Game Fish Association.

What Size Walleye Is Considered A Trophy?

Honestly, an 8-pound walleye for most folks is a trophy walleye. If you don’t fish 100 days or more each year for walleyes, then the chances of catching a 10-pound walleye are slim. I know some folks who may tell you that they’ve caught 20-30, 10-pound-plus walleyes in their fishing careers.

How OLD DOES A 30 INCH WALLEYE GET?

Growth rates largely depend on habitat quality and forage abundance. After reaching maturity around year three, walleye grow between 0.5 and 1 inch per year. Walleye also grow slower in northern latitudes where colder climates decrease their metabolism. This results in 30 inch walleye that are older than average.

How Big Is A Full Grown Walleye Fish?

It will weigh slightly less than half a pound. •3 – At this point the male walleye will be considered mature and will be about 26cm in length. They will weigh about .6lb. •4 – This is the age in which female walleye will begin to outpace males in terms of size. On average, the walleye will weigh just shy of a pound and be 31cm (12.3”) in length.

How Many Eggs Does A Walleye Lay In A Year?

Mature females can lay up to 50,000 eggs each year and their egg production increases as they age. Females in the 30 inch range lay upwards of 250,000 eggs. This is why lakes managed for walleye fishing employ a slot limit on fish that restricts over harvesting of spawning females in their prime.

How Old Was The Oldest Recorded Walleye Fish?

The oldest recorded walleye was 29 years old, weighed 25 lbs., and was 107 cm (42”) long. The name“walleye” comes from the fact that the fish’s eyes stare off in opposite directions, as if just staring at walls.

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