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How Big Is a Pachycephalosaurus?

A pachycephalosaurus is about 15 ft (4.5 m) long. That is 9 ft 2 in (279 cm) more than the height of the average man (5 ft 7 in). A dinosaur with a thick, domed skull.

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How big is a pachycephalosaurus compared to the average man?

A pachycephalosaurus's length is 9 ft 2 in (279 cm) more than the height of the average man (5 ft 7 in). By volume, about 7.1 average men would fit inside a pachycephalosaurus.

Pachycephalosaurus length in feet, inches, centimeters and meters

A pachycephalosaurus measures:

Unit	Value
Feet and inches	14 ft 9 in
Inches	177 in
Centimeters	450 cm
Meters	4.5 m

Pachycephalosaurus size facts

Pachycephalosaurus was about 4.5 meters long.
Its skull dome was up to 25 cm thick.

How does a pachycephalosaurus compare to other things?

A pachycephalosaurus next to 25 things of similar size, plus some everyday references:

Thing	Size	Compared to Pachycephalosaurus
Sun	865,000 miles (1,393,000 km) across	309 million× bigger
Earth	7,920 miles (12,740 km) across	2.83 million× bigger
Mount Everest	5.5 miles (8.849 km)	1,970× bigger
Eiffel Tower	1,083 ft (330 m)	73.3× bigger
School bus	40 ft (12.2 m) long	25 ft (7.7 m) bigger
Pteranodon	20 ft (6 m) long	4 ft 11 in (150 cm) bigger
Pickup truck	19 ft (5.9 m) long	4 ft 7 in (140 cm) bigger
Giraffe	17 ft (5.2 m)	2 ft 3.5 in (70 cm) bigger
Saltwater crocodile	17 ft (5.2 m) long	2 ft 3.5 in (70 cm) bigger
Green anaconda	17 ft (5.2 m) long	2 ft 3.5 in (70 cm) bigger
Quetzalcoatlus	16 ft (5 m)	1 ft 7.5 in (50 cm) bigger
SUV	16 ft (4.9 m) long	1 ft 3.5 in (40 cm) bigger
Car (sedan)	16 ft (4.8 m) long	12 in (30 cm) bigger
Great white shark	15 ft (4.6 m) long	3.9 in (10 cm) bigger
Great hammerhead	13 ft (4 m) long	1 ft 7.5 in (50 cm) smaller
White rhinoceros	13 ft (3.9 m) long	1 ft 11.5 in (60 cm) smaller
Tiger shark	12 ft (3.7 m) long	2 ft 7.5 in (80 cm) smaller
Hippopotamus	11 ft (3.5 m) long	3 ft 3 in (100 cm) smaller
African elephant	10 ft (3.2 m)	4 ft 3 in (130 cm) smaller
Woolly mammoth	10 ft (3.2 m)	4 ft 3 in (130 cm) smaller
Basketball hoop	10 ft (3.05 m)	4 ft 9 in (145 cm) smaller
Tiger	9 ft 10 in (3 m) long	4 ft 11 in (150 cm) smaller
Bottlenose dolphin	9 ft 10 in (3 m) long	4 ft 11 in (150 cm) smaller
Average man (world)	5 ft 7 in (171 cm)	9 ft 2 in (279 cm) smaller
Average woman (world)	5 ft 3 in (159 cm)	9 ft 7 in (291 cm) smaller

Where do these numbers come from?

Sizes are typical adult or reported values, rounded for readability. Read how we measure and compare sizes.

Silhouettes from PhyloPic: Pachycephalosaurus by Gareth Monger. See credits.