Brachiosaurus Size Comparison
Brachiosaurus 3D Viewer pairs published tall-sauropod figures with a 1.8 m person on screen - length about 22 m, head height about 9.4 m, and weight about 46.9 tonnes (46900 kg) - so the giraffe-like scale gap stays readable at a glance.
Brachiosaurus published figures
The Brachiosaurus facts panel and this table use the same Natural History Museum Dino Directory measures:
| Measure | Figure | Vs a 1.8 m person |
|---|---|---|
| Length | 22.0 m (NHM) | ~12x a person end-to-end at the 22 m figure |
| Head height | about 9.4 m (common reconstructions; model scale) | ~5.2x adult standing height; model uses this for Size vs human |
| Weight | 46900 kg / about 46.9 tonnes (NHM) | about 46.9 metric tons on the facts panel |
| When it lived | 152-145 million years ago | Late Jurassic; herbivore; named by Elmer S. Riggs, 1903, Colorado (B. altithorax) |
How the Brachiosaurus size-vs-human toggle stays honest
The Brachiosaurus model is drawn to a fixed on-screen length so it fits the canvas; the Size vs human control then places a 1.8 m person at the true length-to-head-height ratio for the about 22 m figure (head height about 9.4 m). Tap Size vs human under the canvas to show or hide the scale figure - the comparison is proportional, not a decorative sticker.
What a person would see beside a Brachiosaurus
What a person would see is a head towering many times above their own: at about 9.4 m head height, a Brachiosaurus head sits far above a 1.8 m person's head, and the taller forelimbs give the giraffe-like silhouette. From snout to tip the animal spans about 22 m - turn on the person in the viewer and orbit beside a foreleg to feel how the high-browser neck towers past the scale figure.
What the Brachiosaurus size numbers are not
What these size numbers are not is a claim of certainty across every source: the Brachiosaurus size comparison uses NHM published estimates; skin and color are an artistic reconstruction, African Tendaguru material once labelled Brachiosaurus is now usually Giraffatitan (this page follows the NHM Brachiosaurus listing), and no free-licensed Brachiosaurus glTF is re-hosted yet so the viewer stays procedural. For the control walkthrough see how to view Brachiosaurus in 3D. For trade-offs versus phone AR apps see Brachiosaurus 3D viewer vs AR apps.
Other dinosaurs to compare
Other dinosaurs in the collection make useful size comparisons too: Brachiosaurus is one of the tallest sauropods here, so for a horned quadruped herbivore closer to the ground, see the Triceratops 3D Viewer, or for a marine reptile of similar overall length, see the Mosasaurus 3D Viewer.
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