Skip to main content

Bluegill Length To Weight Conversion Chart

Bluegill Length To Weight Conversion Chart

Several methods are available to estimate the weight of a fish. Some use length as well as girth measurements. Weight also can be estimated using only length measurements based on relationship between length and weight. Length-weight equations can be developed for specific waters, regions (e.g., states), or for a particular species.

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.

One easy way to estimate fish weight is through the use of standard length-weight formulas. Species-specific formulas, called standard-weight equations, have been developed for dozens of fish species by fishery biologists to describe the standard growth form of a species as a whole. These relationships often are used to assess body condition (the relative weight or plumpness of a fish), which provides an index of a fish's well-being, such as whether there are forage shortages or surpluses, and can sometimes reflect fish growth rate.

These standard length-weight formulas are often developed using thousands of fish from hundreds of populations across the range of a species, so they describe the "general" growth form of that species. For instance, the equation for black crappie was developed using over 20,000 fish across a range of sizes from 175 populations across the geographic range of black crappie.


*An important thing to keep in mind is that these standard length-weight formulas describe fish in "above-average" condition. In fact, the weights in the tables represent the 75th-percentile in the samples for that particular length, and are not average weights. In other words, if you lined up 100 random bass of the same length in order of weight, and those bass were a good representation of the range of weights for that length, the weight provided in the table would be for the 75th heaviest fish. While it might have made more sense to use the median weight for these formulas, fishery biologists decided to go with the 75th percentile so that the standard weight at a given length was an above-average or "ideal" target to shoot for in terms of body condition. So, if your fish appears plump and healthy, the weights from the table should be relatively close. If your fish is skinny to average, it will weigh less, and if very plump and remarkably "fat" it will weigh more. Just make an adjustment. No formula is 100-percent accurate, but if you have only length and not girth, this should help get you in the ballpark. Your state fishery agency may have standard weight tables based on regional data posted on their website. These formulas use total length of the fish, measured from the tip of the snout to the tip of the tail fin when compressed.


Bluegill 
5 in0.09 lb
6 in0.16 lb
7 in0.27 lb
8 in0.42 lb
9 in0.62 lb
10 in0.88 lb
11 in1.21 lb
12 in1.61 lb
13 in2.10 lb

Get Your Fish On.

Plan your next fishing and boating adventure here.

GET THE NEWSLETTER Join the List and Never Miss a Thing.

Recommended Articles

See More Recommendations

Popular Videos

Hobie MirageDrive 360 Kayak Propulsion: Amazing Control and Power

Hobie MirageDrive 360 Kayak Propulsion: Amazing Control and Power

The Hobie MirageDrive 360 pedal propulsion system is the pinnacle of kayak control with more efficient fin designs, glide technology and allows the boat to be moved in any direction.

The True Story of the Bass Boat Hero Who Broke the Internet

The True Story of the Bass Boat Hero Who Broke the Internet

“If that engine starts without my kill switch on, I ain't the one driving it,” Blake Broussard says after ejection video goes viral.

Channel Cats on Ice

Channel Cats on Ice

The In-Fisherman staff reveals some of the hottest action of the winter season, as they show how to ice 20-pound channel catfish.

Drop-Shotting For Smallies

Drop-Shotting For Smallies

The In-Fisherman crew head to Lake Erie to catch smallmouth bass.

See More Popular Videos

Trending Articles

Across the Walleye Belt, big water often equals big opportunities to enjoy some of the continent's finest walleye fishing.Staying on Big-Water Walleyes Walleye

Staying on Big-Water Walleyes

Dan Johnson - September 09, 2019

Across the Walleye Belt, big water often equals big opportunities to enjoy some of the...

Ned Kehde breaks down the finer points of the Rabid Baits GobyRabid Baits Goby Midwest Finesse

Rabid Baits Goby

Ned Kehde - October 09, 2020

Ned Kehde breaks down the finer points of the Rabid Baits Goby

Each are available in 18 awesome colors.Berkley Frittside New Sizes Baits

Berkley Frittside New Sizes

Thomas Allen - October 14, 2020

Each are available in 18 awesome colors.

Folks are increasingly realizing that the beauty of a big bluegill lies in its rarity.Managing for Big Bluegills Panfish

Managing for Big Bluegills

Cory Schmidt - November 24, 2020

Folks are increasingly realizing that the beauty of a big bluegill lies in its rarity.

See More Trending Articles

More Panfish

A dropper line offering a secondary lure has proven deadly on shallow panfish and bass.Tailgunner Rigging for Panfish Panfish

Tailgunner Rigging for Panfish

Rob Neumann with Jeff Simpson - June 25, 2019

A dropper line offering a secondary lure has proven deadly on shallow panfish and bass.

One easy way to estimate fish weight is through the use of standard length-weight formulas.Bluegill Length To Weight Conversion Chart Panfish

Bluegill Length To Weight Conversion Chart

Dr. Rob Neumann - January 07, 2021

One easy way to estimate fish weight is through the use of standard length-weight formulas.

On Lake Michigan, signs of a perch revival are on the horizon.Perspectives on Perch Panfish

Perspectives on Perch

Cory Schmidt - September 29, 2020

On Lake Michigan, signs of a perch revival are on the horizon.

Before the annual crappie spawn, focus on creek channels for limits of big crappiesCreek Channel Winter Crappies Panfish

Creek Channel Winter Crappies

David A. Brown - January 25, 2021

Before the annual crappie spawn, focus on creek channels for limits of big crappies

See More Panfish

Magazine Cover

GET THE MAGAZINE Subscribe & Save

Digital Now Included!

SUBSCRIBE NOW

Give a Gift   |   Subscriber Services

PREVIEW THIS MONTH'S ISSUE Arrow

Buy Digital Single Issues

Don't miss an issue.
Buy single digital issue for your phone or tablet.

Buy Single Digital Issue on the In-Fisherman App

Other Magazines

Special Interest Magazines

See All Special Interest Magazines

GET THE NEWSLETTER Join the List and Never Miss a Thing.

Phone Icon

Get Digital Access.

All In-Fisherman subscribers now have digital access to their magazine content. This means you have the option to read your magazine on most popular phones and tablets.

To get started, click the link below to visit mymagnow.com and learn how to access your digital magazine.

Get Digital Access

Not a Subscriber?
Subscribe Now