Animals

Grown-ups

🦕 The biggest dinosaurs on Peabody

Every dinosaur number is scientists' best guess from bones.

The top ten

  1. 🦕 Argentinosaurus · 120 ft37 m1more than; scientists' estimate
  2. 🦕 Diplodocus · 80 to 92 ft24 to 28 m2low is the average adult: the same page says scientists estimate that the averag
  3. 🦕 Brachiosaurus · 75 ft23 m3estimate
  4. 🦕 Brontosaurus · 69 ft21 m4up to; from its close cousin Apatosaurus
  5. 🦕 Camarasaurus · 50 ft15 m5maximum
  6. 🦖 Giganotosaurus · 49 ft15 m6estimate
  7. 🦕 Nigersaurus · 49 ft15 m7one museum's estimate from fossils; it is the only checked number we have
  8. 🦕 Edmontosaurus · 39 to 49 ft12 to 15 m8estimate
  9. 🦖 Spinosaurus · 46 ft14 m9scientists' estimate
  10. 🦖 Tyrannosaurus rex · 40 to 43 ft12 to 13 m10a grown-up, nose to tail; scientists' estimate

How this list is ranked

Ranked by the longest length each dinosaur's source gives; pterosaurs are left out (their number is a wingspan).

More Top 10s

  1. Smithsonian Institution, educator's guide to Dinosaurs: Giants of Patagonia, checked 30 October 2026.
  2. National Park Service, Dinosaur National Monument, checked 30 October 2026.
  3. US Geological Survey, Dinosaurs: Facts and Fiction, checked 30 October 2026.
  4. National Park Service, Dinosaur National Monument: Apatosaurus, checked 30 October 2026.
  5. National Park Service, Dinosaur National Monument, checked 30 October 2026.
  6. Smithsonian Institution (si.edu), educator's guide for the film Dinosaurs: Giants of Patagonia, checked 30 October 2026.
  7. Wikidata, from the Natural History Museum's Dino Directory, checked 31 October 2026.
  8. USDA Forest Service, Dakota Prairie Grasslands, checked 30 October 2026.
  9. Wikidata, from the Natural History Museum's Dino Directory, checked 30 October 2026.
  10. USDA Forest Service, Dakota Prairie Grasslands: prehistoric animals, checked 30 October 2026.

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