Allosaurus vs t-rex: size comparison
Size and the space each takes up
- allosaurus
- about 27.9 ft (8.5 m) long and 10.5 ft (3.2 m) tall · 2.2 US tons (2 tonnes)
- t-rex
- about 40.4 ft (12.3 m) long and 13.1 ft (4 m) tall · 9.26 US tons (8.4 tonnes)
Quick answer
A t-rex is about 1.45 times the size of an allosaurus. An allosaurus: about 27.9 ft (8.5 m) long and 10.5 ft (3.2 m) tall, 2.2 US tons (2 tonnes). A t-rex: about 40.4 ft (12.3 m) long and 13.1 ft (4 m) tall, 9.26 US tons (8.4 tonnes).
A t-rex is larger than an allosaurus in both length and height. A t-rex is about 1.45 times the size of an allosaurus.
Typical adult or standard sizes; real ones vary.
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Questions people ask
- How long are these dinosaurs?
- An allosaurus is about 27.9 ft (8.5 m) long, while a t-rex is about 40.4 ft (12.3 m) long.
- How tall do they stand?
- An allosaurus is 10.5 ft (3.2 m) tall and a t-rex is 13.1 ft (4 m) tall.
- What is the weight difference between the two?
- An allosaurus weighs 2.2 US tons (2 tonnes), whereas a t-rex weighs 9.26 US tons (8.4 tonnes).