Black Bear Weight: Averages, Range, Records

What does a black bear weigh? The short answer

An adult male American black bear typically weighs between roughly 130 and 660 lb (60 to 300 kg), and adult females are substantially lighter. That is the honest full-width answer, and the width of it is the point: black bear weight is a variable, not a fact, because season, region, age and food supply all move the number before you ever get the animal onto a scale.

Wikipedia's American black bear entry gives the male range as 60 to 300 kg and notes that females average around 33 to 50 percent less than males. That single line explains most of the confusion you will find online. Any source quoting "the average black bear weighs X" has silently chosen a sex, a season and a region, and usually has not told you which.

So a chart is only as useful as its footnotes. If you want to picture a specific animal rather than a statistical ghost, it helps to hold weight alongside the other dimensions, which is why it is worth reading this next to Black Bear Size: Weight, Length and Paws 2026 rather than on its own.

The rest of this article takes the flat range apart: what makes the same bear two different weights in one year, how the figures break down by sex and age, why regional populations diverge, how black bears really compare with grizzlies, and, at the end, what mass actually looks like on a living animal.

Why one bear has two weights: the seasonal swing

A black bear weighed in spring and the same bear weighed in late autumn are not comparable animals. This is the single largest source of disagreement between weight figures, and almost no summary mentions it. A bear that emerges from the den lean in April can carry a substantially different mass by the time it goes back in.

The Alaska Department of Fish and Game's black bear species profile, read on 23 September 2026, gives spring weights for adult males in Alaska of about 180 to 200 lb and notes that bears may be around 20 percent heavier in the autumn. Read that pairing carefully, because it does more work than it looks like it does.

Take a concrete case. An interior Alaskan male weighed at 190 lb in late May, gaining the roughly 20 percent that the department describes, is somewhere near 228 lb by October, from the same skeleton and the same frame. Nothing about the bear's identity has changed; only the fat has.

What hyperphagia does to a bear

Hyperphagia is the late-summer and autumn feeding drive, when a bear eats for far longer each day than it does in spring and prioritises high-calorie food: berries, mast, salmon where it can reach them. The behaviour exists to build a fat layer that has to last through denning and, for females, through birth and lactation.

Visually, that fat does not distribute evenly. It fills the flanks and the rump first, drops the belly line, thickens the neck and shoulders, and pushes the whole silhouette from a rangy rectangle towards something closer to a barrel on short legs. A heavy autumn bear looks lower and wider even though it has not grown.

The practical upshot: any weight chart that does not state its season is describing an average of two different animals. When you read a figure, ask when the bears were weighed, and treat spring and autumn numbers as separate sets rather than a single range.

Black bear weight chart by sex and age

Here is the breakdown by stage, with the sourcing made explicit in each row rather than hidden. The Wildlife Science Center's American black bear profile gives adult males at 130 to 660 lb and adult females at 90 to 175 lb, which sits consistently alongside Wikipedia's 60 to 300 kg for males and its note that females average 33 to 50 percent less.

| Stage | Weight | What drives the spread | |---|---|---| | Newborn cub (in the den, midwinter) | Very small relative to the adult; widely reported as well under a pound, though the sources consulted here do not publish a precise figure | Litter size and the mother's autumn fat reserves | | Cub at one year (yearling) | No figure published in the sources consulted here; yearlings are plainly smaller than adults and often still travelling with the mother | The quality of that year's berry and mast crop | | Subadult (roughly two to four years) | Overlaps the bottom of the adult range; the 130 lb low end for males reflects young and lean animals rather than mature ones | Growth still in progress, plus dispersal stress in young males | | Adult female | 90 to 175 lb (Wildlife Science Center) | Season, region, and whether she is rearing cubs | | Adult male | 130 to 660 lb (Wildlife Science Center); 60 to 300 kg (Wikipedia) | Season, region, food access, individual age | | Adult male, spring, Alaska | About 180 to 200 lb, with autumn weights around 20 percent higher (Alaska Department of Fish and Game, read 23 September 2026) | Post-denning fat loss |

Notice that the top of the male range is more than five times the bottom. No other commonly quoted mammal statistic is asked to stretch that far, and it is the reason a single "average" figure misleads more than it informs.

Why are black bear cubs so small at birth?

Black bear cubs are born in midwinter, inside the den, to a mother who is not eating and is living off her own fat. Birth at a tiny size is the compromise that arrangement demands: the mother cannot afford the metabolic cost of carrying large young through denning, so the cubs do their growing outside her, on milk.

The consequence is one of the steepest growth curves in North American mammals. A cub that begins life small enough to sit in two hands may be travelling and climbing competently by its first summer, and a male from that litter can reach several hundred pounds within a decade if the food years are kind. There is more on that life cycle and its anatomy in Black Bear: Facts, Fur and Form in 2026.

How old is a 400 lb black bear likely to be?

A 400 lb black bear is almost certainly an adult male, and probably not a young one, but age cannot be read from weight with any precision. A well-fed male in a rich temperate range might reach that figure years earlier than a male on a poor northern range ever would, if the northern male reaches it at all.

The honest answer is a range with a caveat. Weight tells you about food history and season at least as much as it tells you about years lived, which is why biologists age bears from tooth cementum rather than from the scale.

Average weight of a black bear by region: California, Canada and beyond

Regional variation is the second thing the flat figures hide. Black bears occupy an enormous latitudinal and ecological span, and the populations at the two ends of it are not carrying the same mass. Food density, not genetics alone, does most of the explaining.

The mechanism is straightforward. A bear on a coastal or productive temperate range with a long growing season, abundant soft mast, oak or salmon runs has more calories available for more weeks of the year than a bear on a thin northern interior range where the berry crop is short and the winter is long. The Alaskan spring figures in the Alaska Department of Fish and Game profile sit well below the top of the continental male range, and that is consistent with the pattern rather than a curiosity.

On the specific regional numbers that people search for, I want to be careful. Figures for California black bear weight and Canadian black bear weight circulate widely, and some of them may well be accurate, but they are not verifiable from the sources in front of me today, so I am not going to repeat them as though they were. What can be said with confidence is the direction of travel: populations with concentrated, reliable, high-calorie food run heavier than populations without it.

That also means regional averages are unstable in a way national ones are not. A single failed mast year can move a local population's autumn weights noticeably, and a landfill, an orchard or an unsecured bin can move one individual's weight a great deal.

Black bear vs grizzly weight: how the two really compare

Grizzlies are typically heavier and more heavily built than black bears, but the ranges overlap far more than most people expect, and a large male black bear can comfortably outweigh a small female grizzly. Weight is therefore close to the worst single identifier you could choose in the field.

The reliable features are structural, not numerical. A grizzly carries a pronounced muscular hump over the shoulders, a dished or concave facial profile, long straight front claws built for digging, and short rounded ears. A black bear shows a straighter facial profile from forehead to nose, the highest point of the back over the rump rather than the shoulders, shorter curved climbing claws, and taller more prominent ears.

Colour is no help at all, which is worth saying plainly. Black bears range through cinnamon, blonde and near-white, and brown bears are not reliably brown, so anyone identifying by coat is guessing. The full set of tells is laid out in Grizzly Bear vs Black Bear: Tell Them Apart 2026 and, from the other direction, in Brown Bear vs Black Bear: Telling Them Apart.

There is a further wrinkle that trips up even careful readers, which is that "grizzly" and "brown bear" are not straightforwardly synonyms, and the coastal brown bears that produce the enormous published weights are not what most people mean by grizzly. That distinction is unpicked in Brown Bear vs Grizzly Bear: Differences 2026.

Reading weight on a living bear: what mass looks like in the body

You can estimate a bear's condition without a scale, and observers who spend time with the animals do it constantly. The cues are about where the mass sits rather than how much total volume is present, and they are the same cues a draughtsman has to get right for a drawing to read as a real animal.

Start with the hide. On a lean spring bear the skin lies fairly close over the hips and the pin bones, and you can often see the run of the hip and the line of the ribs suggested through the coat. On a heavy autumn bear the hide goes slack: it hangs, it swings a fraction behind the movement of the body, and the winter coat behaves almost as a separate layer sliding over the fat beneath it.

Then look at the depth of the chest immediately behind the forelegs. A well-conditioned bear is deep there, with the belly line running level or dropping away from the elbow; a lean bear shows a visible tuck, the belly rising towards the flank, and consequently looks longer-legged and taller than it did four months earlier at greater weight.

Muzzle proportion is the age cue rather than the weight cue, and the two get confused. Young bears have relatively short muzzles in a rounder head, giving them the slightly puppyish look that makes people underestimate them; mature animals show a longer, heavier muzzle and a broader zygomatic width, so a mature bear reads as more massive in the head even when the body weight has not changed.

Why this matters in graphite

In David Dancey-Wood's drawings the weight of an animal is decided long before the fur is rendered. Mass is a question of where the darkest core shadow falls under the belly, how the coat breaks over the shoulder, whether the hide is taut or slack at the hip, and these decisions are made in the underdrawing, not added at the end. A bear drawn with the mass in the wrong place looks like a costume however immaculate the hair is.

That observational discipline is the through-line in the mammal drawings, where the same principles govern a bear's autumn bulk and the loose skin of an elephant's flank. David's work has been praised by the late David Shepherd O.B.E., and Wildlife Sketches has been trusted by collectors for over ten years, which is a long time to spend looking closely at how weight sits on a body.

It is also why apparent size has practical consequences. People routinely misjudge a bear's mass from a photograph or a brief sighting, and an autumn bear looks far more formidable than the same animal did in May, which distorts how risk gets assessed in the moment. That gap between how big a bear looks and what it actually is sits behind a good deal of the discussion in Are Black Bears Dangerous? The Honest Answer 2026.

Record weights and why the big numbers are misleading

The 500 lb and 600 lb figures you see quoted are real at the top end of the published range, but they describe exceptional individuals and not typical ones. The Wildlife Science Center profile tops its male range at 660 lb, and the Wikipedia entry's 300 kg upper figure is the same story in metric: these are the ceiling, not the centre.

Exceptionally heavy black bears also tend to share a history. Very large individuals frequently come from ranges with concentrated, calorie-dense and often human-associated food, whether agricultural crops, orchards or waste, and they are usually old males weighed in late autumn at their absolute peak. Every one of those factors stacks in the same direction.

Verifying record claims is genuinely hard, and it is worth saying so. Many circulating figures come from hunting accounts, estimated rather than scaled weights, or dressed weights presented as live weights, and once a number enters the internet it is repeated far more often than it is checked. I would treat any specific record figure without a named weighing authority as anecdote.

For a sense of what genuinely large ursine mass looks like, the comparison is with the brown bears rather than the outliers of this species, and the build difference is easier to see in a drawing than in a number, as in Brown Bear and Cub: Facts, Form and Fur in 2026.

FAQ

Is a 300 pound black bear big?

Yes, comfortably. A 300 lb black bear sits well above the spring adult male figures the Alaska Department of Fish and Game gives for its own bears, around 180 to 200 lb, and far above the 90 to 175 lb female range published by the Wildlife Science Center. It is a large adult male, though it is nowhere near the 660 lb top of the published range.

Is a black bear bigger than a grizzly?

Usually not. Grizzlies are typically heavier and more heavily built, but the ranges overlap, so a large male black bear can outweigh a small female grizzly. Identify by shoulder hump, facial profile, claw length and ear shape rather than by estimated weight.

Can black bears be 500 pounds?

Yes, though rarely. The published upper limit for adult males reaches 660 lb in the Wildlife Science Center profile and 300 kg in Wikipedia's entry, so 500 lb is within range. Bears that heavy are typically old males in peak autumn condition, often with access to concentrated food, and they are not what you should expect to see.

How old is a 400 pound black bear?

It is very likely a mature adult male, but weight is not a reliable age test. Growth rate depends heavily on region and food supply, so two males of the same weight can differ by years. Biologists age bears from tooth cementum rather than from mass.

What is the average weight of a female black bear?

The Wildlife Science Center gives adult females at 90 to 175 lb, and Wikipedia's American black bear entry notes that females average roughly 33 to 50 percent less than males. As with males, the figure moves with season, so a spring female and an autumn female are not the same number.

How much does a black bear cub weigh at birth?

Newborn cubs are strikingly small relative to the adult, because they are born midwinter in the den to a mother living on her own fat reserves. Figures under a pound are widely repeated, though the sources consulted for this article do not publish a precise number, so treat any single figure with caution. What is not in doubt is the growth rate that follows.

If reading about where mass sits on a bear has made you want to look at one properly drawn, the graphite originals and signed limited edition prints are the place to start, with a framing service for both and gift cards available for print purchases. Every purchase plants a tree. Browse the collection at Wildlife Sketches.