Which measurement is bigger?
The recorded length of Diplodocus is 2.167 times the recorded length of Tyrannosaurus rex. The selected measurements are 26 m and 12 m, respectively.
| Object | Metric size | Imperial size | Dimension |
|---|---|---|---|
| Diplodocus | 26 m | 85.3 ft | length |
| Tyrannosaurus rex | 12 m | 39.4 ft | length |
What this comparison measures
Use total body length to compare a long-necked sauropod and a theropod. Their different postures change the outline but not the length measurement used here.
Diplodocus: Museum estimate of total body length, including neck and tail.
Tyrannosaurus rex: Museum body length estimate of 12 m; larger specimens exist.
The drawings use the same physical scale, but are simplified illustrations. They show a selected linear dimension rather than mass, surface area or volume. The space between objects makes the comparison readable and does not represent a real-world separation.
Inspect the sources
Both measurement sources are linked below the interactive board. The individual Diplodocus entry and Tyrannosaurus rex entry provide the selected conventions and related objects.
Change either selection to explore another pair. The full size comparison tool also lets you enter a personal height. To practise estimating rather than reading the answer first, try the daily five.