The bite force of a dog is reported as Pound-force per Square Inch (PSI). PSI is a scientific method for measuring the amount off force applied on a particular area. Just to illustrate a comparison, the recommended tyre pressure of a sedan is around 32 PSI. When measuring bite force, it is the pressure exerted by teeth and jaws over the area that is being bitten. Humans have a maximum bite force of around 120 PSI. You can imagine that as a 120 pound man standing over a dog’s head to transmit that force through a dog’s bite.
It must be understood here that the bite force of a dog is highly variable as per the mood of the dog. Bite force of a dog threatened with a do-or-die threat can easily be twice than that of a bite force measured under normal conditions. Simulated test condition tries to discover the ‘average bite strength’ under standard experimental conditions.
As per Dr. Ellis (Journal of Anatomy, 2009), larger the dog’s head and wider the jaw, greater will be the bite force exerted. Bite strength number is also dependent on whether the front teeth or the rear teeth bite force is measured. The bite force of the rear teeth can be significantly higher than that of the front.
Strongest bite dog breeds
German Shepherd is probably the most popular guard dog breed in the world. Bite strength of 238 PSI is powerful enough to latch onto a toughest opponent and pull him down. German Shepherds are highly intelligent, easily trainable and great around children.
Extremely well respected by the criminal community, Doberman has a bite force of 245 PSI. Ferocious hunters and killers, they have strong alertness levels and quick agility. They can guard large properties being quick on the feet with a bite that can definitely extract its pound of flesh.
With a bite force of 305 PSI, Bulldogs were developed to hold down a Bull’s nose using their jaws during the sport of bullbaiting. Needless to say, their muscled body and powerful jaws are perfect for this barbaric task. If a Bull cannot release itself from this death’s grip, imagine the fate of Homo Sapiens.
One of the world’s most dangerous dog breeds, Rottweiler have been banned by a lot of cities all over the world due to their bloody reputation. With bite strength of more than 328 PSI, a Rottweiler has a massive head and powerful jaws. What is more worrisome is the natural trait of aggression that they have as they bite to kill. There are numerous reported cases where a Rottie has killed a human and even a reported case where two Rottweiler’s together killed a Tiger to save their owner from near certain death. When it comes to matters of domesticated dogs, Rottweiler is the most ruthless Bite King.
With the largest head and the widest mouth, English Mastiff has reported bite strength of a massive 556 PSI. That is almost comparable to that of a Lion and enough to shatter even the largest bones of your body. The good news is that they have a calm temperament and docile behaviour. World’s largest dog breed in terms of its mass, the largest Mastiff has been reported at 155 kg. We will leave it to your imagination if someone with that bite strength and weight were to fall upon you.
Just to put things into perspective, a Lion has bite strength of 600 pounds, a Hyena of 1000 pounds and a crocodile of 2500 pounds compared to Humans as 120 pounds!!