Dinosaurs
How long is a Brachiosaurus?
A Brachiosaurus is 22 m · 72.2 ft long.
Brachiosaurus at true scale
- Brachiosaurus 22 m · 72.2 ft
- New Routemaster bus 11.2 m · 36.9 ft
- Tyrannosaurus rex 12 m · 39.4 ft
- Orca up to 9.75 m · 32 ft
Brachiosaurus (blue) beside a New Routemaster bus, a Tyrannosaurus rex and an orca, all on one scale.
Brachiosaurus was a long-necked sauropod about 22 m long, according to the Natural History Museum, which lists its weight at 46,900 kg. Its length is about four times the height of a tall male giraffe.
Compared with familiar things
- A Brachiosaurus is about 2.0× a New Routemaster bus (11.2 m · 36.9 ft).
- A Brachiosaurus is about 1.8× a Tyrannosaurus rex (12 m · 39.4 ft).
- A Brachiosaurus is about 2.3× an orca (up to 9.75 m · 32 ft).
- A Brachiosaurus is about 3.0× a football goal (7.32 m · 24 ft).
Can you guess it by eye?
Play five comparisons featuring a Brachiosaurus: resize each object beside a fixed reference, then see how close you were. No sign-up needed.
Play five comparisonsWhat is measured
Estimated length: 22 m · 72.2 ft. Natural History Museum estimate for Brachiosaurus: length 22.0 m.
Source: Natural History Museum, London — Dino Directory: Brachiosaurus. Checked 2026-09-28. The silhouette is scaled so this measurement is exact; its other proportions are illustrative.