DinoLog
Size & comparisons
How big dinosaurs really were, next to people, buses and each other, with the evidence behind every number.
Size & comparisons
Carcharodontosaurus vs Giganotosaurus: Which Was Bigger?
Two close relatives from the same age, on different continents, and almost the same size. Giganotosaurus edges ahead in most estimates, within the error bars.
DinoDex team · 27 September 2026 · 3 min read
Size & comparisons
Utahraptor vs Velociraptor: The Real Jurassic Park Raptor?
Utahraptor was roughly four times as long as Velociraptor. Neither exactly matches the film; the closest match in size is a third raptor, Deinonychus.
DinoDex team · 27 September 2026 · 3 min read
Size & comparisons
Allosaurus vs T. rex: Why They Never Met
Roughly 80 million years separate them, more time than separates T. rex from us. And T. rex was several times heavier. The two predators, compared.
DinoDex team · 27 September 2026 · 3 min read
Size & comparisons
Brachiosaurus vs Argentinosaurus: Tallest vs Heaviest
Argentinosaurus was more than twice as heavy. Brachiosaurus was built to reach high, with long front legs, but the evidence for which stood taller is thin.
DinoDex team · 27 September 2026 · 3 min read
Size & comparisons
Giganotosaurus vs T. rex: Which Was Bigger?
Almost a tie in length, at around 12 to 13 metres each. T. rex was probably the heavier animal, and it is known from much better skeletons.
DinoDex team · 27 September 2026 · 3 min read
Size & comparisons
The Smallest Dinosaurs: Compsognathus, Microraptor and More
Crow-sized Microraptor and chicken-sized Compsognathus are among the smallest non-bird dinosaurs known from good skeletons. The true record holder is alive today.
DinoDex team · 27 September 2026 · 3 min read
Size & comparisons
How Big Was Spinosaurus Compared to T. rex and a Human?
Just under 14 metres long and about 7.4 tonnes in the latest reconstruction: about eight people lying head to toe. Here is why that number keeps changing.
DinoDex team · 27 September 2026 · 4 min read
Size & comparisons
How Long Was Diplodocus Compared to a Bus?
About 24 to 26 metres: two city buses parked end to end. Most of that was neck and tail, which is why Diplodocus was long but surprisingly light.
DinoDex team · 27 September 2026 · 3 min read
Size & comparisons
Was Argentinosaurus the Biggest Dinosaur Ever?
By weight, Argentinosaurus is the leading candidate, at roughly 65 to 83 tonnes. But it is known from a handful of bones, and Patagotitan is close behind.
DinoDex team · 27 September 2026 · 4 min read
Size & comparisons
How Tall Was a Velociraptor Compared to a Human?
About 1.5 metres long and 15 kilograms: closer to a large turkey than to the film monsters. Here is how a real Velociraptor measures up against a person.
DinoDex team · 27 September 2026 · 4 min read
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