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Prehistoric Life

How long was Ankylosaurus magniventris?

An adult Ankylosaurus magniventris had a total length of about 8 m (26 ft).

What is measured: adult, total body length

Ankylosaurus magniventris (8 m) drawn to scale beside a 20-foot shipping container (6.06 m) and a city bus (12 m)
Drawn to scale, from left to right: Shipping container (20 ft) (6.06 m), Ankylosaurus magniventris (8 m) and City bus (12 m).

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How big is that, really?

  • A little longer than a 20-foot shipping container
  • A little shorter than a city bus
  • About 2 would fit end to end along a tennis court
  • About 6 would fit end to end along an Olympic swimming pool
  • About 4× the height of a doorway

Learn

Facts about Ankylosaurus magniventris

Ankylosaurus carried heavy armor and a massive tail club that could have deterred large predators.

Source: Royal Tyrrell Museum — Ankylosaurus; Encyclopaedia Britannica — Ankylosaurus

Prehistoric Life

NameSizeCompared with Ankylosaurus magniventris
Pteranodon7 m (23 ft)0.88×
Argentavis magnificens7 m (23 ft)0.88×
Megalania prisca7 m (23 ft)0.88×
Helicoprion bessonowi7.6 m (25 ft)0.95×
Ankylosaurus magniventris8 m (26 ft)this page
Prototaxites8 m (26 ft)same size
Nigersaurus taqueti9 m (30 ft)1.1×
Albertosaurus sarcophagus9 m (30 ft)1.1×
Parasaurolophus walkeri9.5 m (31 ft)1.2×
Allosaurus fragilis9.7 m (32 ft)1.2×

Test your sense of scale

Which is bigger: Ankylosaurus magniventris or Allosaurus fragilis?

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