Tyrannosaurus rex Size Comparison
Tyrannosaurus rex 3D Viewer pairs published fossil figures with a 1.8 m person on screen - length about 12.3 m, hip height about 3.7 m, and weight about 8.9 tonnes - so the height gap stays readable at a glance.
Tyrannosaurus rex published figures
The Tyrannosaurus rex facts panel and this table use the same real published measures (ranges are not needed here - these are the values the viewer shows):
| Measure | Figure | Vs a 1.8 m person |
|---|---|---|
| Length | about 12.3 m | ~6.8x a person standing end-to-end |
| Hip height | about 3.7 m | ~2.1x adult standing height |
| Weight | about 8.9 tonnes | many times a human body mass |
| When it lived | 68-66 million years ago | Late Cretaceous |
| Teeth note | ~60 serrated teeth up to 20 cm | including the root |
How the Tyrannosaurus rex size-vs-human toggle stays honest
The Tyrannosaurus rex 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 to that real ~12.3 m figure. 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 Tyrannosaurus rex
What a person would see is a hip joint towering overhead: at about 3.7 m at the hips, a Tyrannosaurus rex hip joint sits well above a 1.8 m person's head. From snout to tail the animal spans roughly 12.3 m - turn on the person in the viewer and stand the camera beside a hind leg to feel how far the back is above eye level.
What the size numbers are not
The Tyrannosaurus rex size comparison uses published bone-based estimates; skin color in the viewer is still an artistic reconstruction. For the control walkthrough see how to view Tyrannosaurus rex in 3D. For trade-offs versus phone AR apps see Tyrannosaurus rex 3D viewer vs AR apps.
Other dinosaurs to compare
Other dinosaurs in the collection make useful size comparisons too: for another giant theropod near its own size, see the Spinosaurus 3D Viewer, or for its classic horned rival in the fossil record and in popular culture, see the Triceratops 3D Viewer.
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