Weight of Emperor Penguin [Facts and Insights]

Adult Emperor Penguins typically weigh between 22 to 45 kg. But their weight is not constant throughout the year. These birds go through dramatic changes in weight during different seasons.

Male Emperor Penguins have an average weight of 38 kg (84 lb) at the beginning of the breeding season. On the other hand, females have an average weight of 29.5 kg (65 lb).

The weight of Emperor Penguins may not be the first thing that comes to mind. When thinking about these iconic creatures. But it’s a crucial aspect of their biology. That enables them to survive in one of the world’s most unforgiving environments.

Emperor Penguin

But what’s perhaps most impressive is their ability to gain and lose weight rapidly throughout the year. Let’s take a closer look at the weight of Emperor Penguins and uncover fascinating insights about their size.

Do Emperor Penguins Weigh up to 100 Pounds?

Yes, emperor penguins can weigh up to 100 pounds. They are the largest penguin species.

Emperor Penguin

Male penguins tend to be slightly larger than females. Both sexes can gain a significant amount of weight during the breeding season as they store up fat reserves to sustain them during the long months of incubating their eggs. So they can weigh up to 100 pounds.

[Note: The weight of Male penguins: 38 kg (84 lb), whereas the weight of female penguins: 29.5 kg (65 lb) ~ Its a report from the beginning of the breeding season. However, after the breeding season, the weight of both males and females drops to 23 kg (51 lb).]

See also  Do Sea Lions Eat Penguins? [Explained]

Do You Know? Emperor Penguins are one of the Fifth Heaviest Living Bird Species.

Which Penguin Is the Tallest and Heaviest?

Emperor penguins are one of the tallest and heaviest of all living penguin species. 

But here is an interesting fact. You may think that Emperor penguins are the only tallest and heaviest penguins ever. No doubt, they are among the living penguin species.

Did you notice in the information mentioned above that they are one of the tallest and heaviest of all living penguins? That means there may be other penguin species that were the tallest and heaviest ever. Yes, you are thinking right.

According to Guinness World Records, the heaviest and tallest penguin species known to science is the giant penguin, “Palaeeudyptes kiekowskii.” They lived an estimated 37 thousand years ago. It could weigh up to 115 kg and had a height of up to 2 m. 

Another record holder for the tallest penguin species was Nordenskjoeld’s giant penguin, “Anthropornis nordenskjoeldi,” It could grow up to 1.7 m.

Is the Emperor Penguin Bigger Than the King Penguin?

Yes, Emperor penguins are bigger than King penguins. The Emperor Penguin is about 110–120 cm (43–47 in) tall and weighs between 50 to 100 lbs.

Emperor Penguin

While the King Penguin stands about 70 to 100 cm (28 to 39 in) tall and weighs between 9.3 to 18 kg (21 to 40 lb). The King Penguin is smaller than the Emperor Penguin. When observing the King Penguin and the Emperor Penguin, they may appear quite similar.

See also  Do Penguins Have Tongues? [Explained]

Do You Know? Emperor Penguin is the Largest Penguin Species & King Penguin is the 2nd Largest Penguin Species.

Why Are Emperor Penguins So Big?

The reason they are so big is that they live in extremely harsh environments (some of the coldest temperatures on the planet). The larger body size allows Emperor Penguins to conserve heat better and maintain their body temperature in such extreme conditions.

The bigger the animal, the smaller its surface area-to-volume ratio, which means it loses heat more slowly than a smaller animal. The larger body size allows them to store more energy in their fat reserves, which can sustain them for the long period during incubation.

How Big Are Emperor Penguins When They Are Born?

When Emperor penguins are born, they weigh around 150 to 200 grams. The weight of adult penguins at that time is down from 22kg to 30 kg.

Emperor Penguin

Emperor penguin chicks are 6 inches tall. These tiny chicks are covered in soft, fluffy down feathers. That helps keep them warm in the harsh Antarctic environment.

Despite their small size, these chicks are remarkably resilient. They quickly begin to grow and develop under the watchful eye of their parents. With the help of frequent feedings and careful nurturing, they rapidly gain weight and size.


Do mega penguins exist?

No, mega penguins do not exist. The largest penguin species that we know of today is the emperor penguin. But in the past, there were penguin species that were much larger than any living species today.

See also  How Smart Are Penguins?

Is a penguin bigger than an ostrich?

No, penguins are not bigger than ostriches. In fact, ostriches are one of the largest birds in the world. Ostriches can grow up to 2.9 meters (9.5 feet) tall. And they weigh up to 156 kilograms (344 pounds).

How heavy is an emperor penguin in kilograms?

An adult Emperor penguin can weigh up to 22–45 kilograms. The weight of an emperor penguin ranges from 22.7 to 45 kg.


According to current research, emperor penguins are the only living and endemic large species. They can gain and lose weight rapidly throughout the year. This allows them to store energy for long periods of incubation.

Also, gradually, they grow and develop with the help of their parents. Overall, the weight of Emperor penguins is a crucial aspect of their biology. That enables them to thrive in some of the world’s most challenging conditions.