A very large T. rex stretched about 12.5 m from snout to tail. Its body was shorter than Spinosaurus in this atlas, but much deeper and more heavily built.
Length
about 12.5 m long
Height
about 4 m at the hips
Mass
about 8.4 tonnes for a very large adult
When
Late Cretaceous - 68-66 million years ago
Tyrannosaurus rex and Spinosaurus shown beside an adult human for scale
All bars share one linear metre scale. Human height and animal body length use different orientations, noted on each detail page.
Interactive true-scale view
T. rex beside a 1.7 m human
The shared ground plane keeps 12.5 m and the human reference on one metre scale. Detailed models load progressively; labeled wireframes preserve scale where a model is pending.
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T. rex12.5 mDetailed 3D model
Human1.7 mDetailed 3D model
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Its body length equals roughly 7.4 standing adults laid head to toe. The hips alone rose to around 4 m - well above two reference humans stacked vertically.
More than one number
Length, height and body mass
The largest well-known individuals approached 13 m and exceeded eight tonnes. A skull could reach roughly the height of a person, while the animal's weight was comparable to a large elephant.
Display length
12.5 m
Display height
4 m
Display mass
8.4 t
Evidence boundary
How certain is this size?
T. rex estimates vary by specimen. ScaleCheck uses 12.5 m and 8.4 tonnes to represent a very large adult rather than treating every individual as the same size.
Why compare it
The question this animal answers
T. rex is the familiar anchor for giant theropods. Comparing it with longer but lighter predators reveals why length alone does not decide which dinosaur was truly larger.
