en
Download

Prehistoric Life

How long was Pachycephalosaurus wyomingensis?

An adult Pachycephalosaurus wyomingensis had a body length of about 4.5 m (15 ft).

What is measured: adult body length

Pachycephalosaurus wyomingensis (4.5 m) drawn to scale beside a doorway (2 m) and a 20-foot shipping container (6.06 m)
Drawn to scale, from left to right: Doorway (2 m), Pachycephalosaurus wyomingensis (4.5 m) and Shipping container (20 ft) (6.06 m).

Compare

How big is that, really?

  • A little shorter than a 20-foot shipping container
  • About 2 would fit end to end along a city bus
  • About 5 would fit end to end along a tennis court
  • About 2.3× the height of a doorway
  • About 2.6× the height of an adult person

Learn

Facts about Pachycephalosaurus wyomingensis

Its thick domed skull roof may have been used for display or head-butting, although the behavior remains debated.

Source: Smithsonian National Museum of Natural History, Pachycephalosaurus; Royal Tyrrell Museum, Pachycephalosaurus

Prehistoric Life

NameSizeCompared with Pachycephalosaurus wyomingensis
Megatherium americanum3.5 m (11 ft)0.78×
Dinornis robustus3.6 m (12 ft)0.8×
Palaeoloxodon antiquus4 m (13 ft)0.89×
Deinotherium giganteum4 m (13 ft)0.89×
Mammuthus columbi4 m (13 ft)0.89×
Pachycephalosaurus wyomingensis4.5 m (15 ft)this page
Anhanguera santanae4.6 m (15 ft)1×
Iguanodon bernissartensis5 m (16 ft)1.1×
Kentrosaurus aethiopicus5 m (16 ft)1.1×
Paraceratherium transouralicum5.5 m (18 ft)1.2×

Test your sense of scale

Which is bigger: Pachycephalosaurus wyomingensis or Paraceratherium transouralicum?

Topics

More sizes like this