A silverback gorilla is very strong, especially when it comes to grip strength and bite force. It is hard to measure exactly how strong gorillas are, because they rarely show their full power in the wild or under study conditions, and much of what researchers know comes from indirect observation rather than direct testing.
Gorillas have large, strong teeth. A silverback’s bite can reach 1,300 pounds per square inch, considerably stronger than a lion’s bite at 650 PSI or a great white shark’s bite at 625 PSI. This bite force comes from a combination of powerful jaw muscles and a skull structure built to support them.
Gorillas are usually shy and gentle, but can become very aggressive if they feel threatened or scared. You can see these traits firsthand when trekking gorillas in Uganda, Rwanda, or the Democratic Republic of Congo, where guides brief visitors on how to behave calmly around a silverback to avoid triggering a defensive reaction.
Measuring Gorilla Strength
A study from 1924 found that an adult gorilla can push or pull with about 450 kilograms of force, a figure that has been referenced in strength comparisons ever since.
Compared to humans, a gorilla is estimated to be about nine times stronger than an average man, a gap that becomes clear when comparing lifting and pulling capacity side by side.
According to Guinness World Records, a silverback gorilla can lift up to 815 kilograms of dead weight, while a strong human can lift about 410 kilograms at most. This means even an elite human strength athlete would struggle to match half of what an adult silverback can manage.
Why Gorillas Are So Powerful
Gorillas have longer arms than legs, and their hands carry most of their body weight as they move through the forest on their knuckles. This weight-bearing role is part of why their arms have developed to be so strong over time. They also have larger stomachs relative to their chests, a trait tied to their largely plant-based diet and the digestive system needed to process it.
Gorillas can break bamboo sticks with ease, a sign of strength estimated at roughly 20 times that of an average man. Their grip is powerful enough to crush a crocodile, and their build allows for forceful movements, such as tearing down a large banana tree to reach fruit or snapping thick branches while foraging.
Trekking Mountain Gorillas
Mountain gorillas live in several national parks across East and Central Africa. Rwanda charges $1,500 per person for permits, Uganda charges $800, and Congo charges $400, giving travelers a range of options depending on budget.
Only people aged 15 and above are allowed to trek mountain gorillas, and permits should be booked 3 to 6 months before your trip, given how limited daily permit numbers are for each gorilla family.
Mountain Gorilla Size
Male mountain gorillas weigh between 374 and 484 pounds, while females weigh less, ranging from 160 to 215 pounds. This size difference, combined with their raw strength, is part of what makes encountering a silverback in the wild such a striking experience for visitors on a gorilla trekking safari, and part of why trekking rules exist to keep both gorillas and visitors safe during every encounter.
