Utahraptor Size Comparison
Utahraptor 3D Viewer pairs published Early Cretaceous figures with a 1.8 m person on screen - length about 6-7 m (Size vs human uses 6.1 m), hip height roughly 1.5 m, and weight about 280-700 kg - so the scale gap stays readable at a glance.
Utahraptor published figures
The Utahraptor facts panel and this table disclose published ranges rather than one invented single number; the Size vs human control uses 6.1 m as the length scale ratio:
| Measure | Figure | Vs a 1.8 m person |
|---|---|---|
| Length | about 6-7 m; Size vs human uses 6.1 m (NHMU ~20 ft) | ~3.4x a person end-to-end at the 6.1 m scale figure |
| Hip height | roughly 1.5 m (NHMU ~5 ft) | about shoulder height on a shorter adult; below a tall person's head |
| Weight | about 280-700 kg (Kirkland et al. 1993 ~280-360 kg; later estimates for largest ~500-700 kg) | shown as a method/specimen range, not one point |
| Sickle claw | up to 24 cm (9.5 in) - largest recorded for any dromaeosaurid | disclosed in facts panel and prose; not a separate click target |
| Vs other raptors | Utahraptor ~6-7 m / 1.5 m hip; Deinonychus ~3.3-3.4 m / 0.87 m; Velociraptor ~2 m / 0.5 m | the largest known dromaeosaurid in this collection |
| When it lived | ~139-135 million years ago (Berriasian-Valanginian), Cedar Mountain Formation, Utah | named 1993 by Kirkland, Gaston and Burge; species ostrommaysi/ostrommaysorum |
How the Utahraptor size-vs-human toggle stays honest
The Utahraptor 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 ratio used by the viewer (6.1 m). Tap Size vs human under the canvas to show or hide the scale figure - the comparison is proportional, not a decorative sticker. Published length still spans about 6-7 m, so the toggle picks one clear scale inside that disclosed range.
What a person would see beside a Utahraptor
What a person would see is a bipedal sickle-clawed predator that towered over both previously shipped raptors - turn on the person in the viewer and orbit beside a hind leg to feel how the body sits relative to the scale figure. Skin color is an artistic reconstruction; feathering is inferred from related dromaeosaurids and left unrendered; the 2001 multi-individual quarry find only hints at social behavior, not confirmed pack hunting.
What the Utahraptor size numbers are not
What these size numbers are not is a claim of one precise weight: the Utahraptor size comparison discloses the about 6-7 m, 1.5 m hip, and 280-700 kg ranges and uses 6.1 m only for the Size vs human scale; it does not invent a settled pack-hunting claim, does not claim Utahraptor was the Jurassic Park Velociraptor model, no free-licensed Utahraptor glTF is re-hosted yet so the viewer stays procedural, and this is not a win/lose game. For the control walkthrough see how to view Utahraptor in 3D. For trade-offs versus phone AR apps see Utahraptor 3D viewer vs AR apps.
Other dinosaurs to compare
Other dinosaurs in the collection make useful size comparisons too: for the smaller North American raptor see the Deinonychus 3D Viewer, or for the much smaller Mongolian raptor see the Velociraptor 3D Viewer.
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