Dinosaur Size Comparison
T. rex and Brachiosaurus in 3D next to a person and an African elephant.
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in
The numbers
- Tyrannosaurus rex: about 40 ft long, about 12 to 13 ft at the hips. That is about 7 times the height of a 5 ft 9 in person. Source: Field Museum (Sue).
- Brachiosaurus: about 85 ft long and 40 ft tall. That is about 15 times the height of a 5 ft 9 in person. Source: museum reconstructions; estimates vary.
- African elephant: about 10 to 13 ft at the shoulder. That is about 3 times the height of a 5 ft 9 in person. Source: Smithsonian's National Zoo.
The 3D view draws each one at the size listed. Animals vary between individuals, and prehistoric sizes are estimates.
Tyrannosaurus rex was about 40 feet long and stood around 12 to 13 feet at the hips, based on the most complete skeletons. Brachiosaurus was far bigger: about 85 feet long, and with its neck raised its head could reach around 40 feet up, roughly the height of a four-story building.
An African elephant, the largest land animal today, stands about 10 to 13 feet at the shoulder, close to T. rex at the hips. Dinosaur sizes are reconstructions, so treat them as good estimates.