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How much did a large adult Tyrannosaurus rex weigh?
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tyrannosaur
The fossilized remains of Sue, the most complete Tyrannosaurus rex skeleton in the world, on display at the Field Museum of Natural History, Chicago.
A large adult Tyrannosaurus rex is estimated to have weighed between 4,000 and 7,000 kg (approximately 9,000 to 15,000 pounds).123
Some exceptional specimens have been estimated to be even heavier; for instance, the specimen known as "Scotty" is estimated to have weighed 8,870 kg (19,555 pounds). These massive predators, which were the largest members of the tyrannosaur group, typically reached their full adult size in less than 20 years.124