How big is Brachiosaurus?
For this comparison, Brachiosaurus measures 22 m in length (72.2 ft). Museum estimate of total length, not standing height.
A long-necked animal can be drawn upright while its question still asks for length.
Put the measurement in perspective
The recorded length is 12.941 times the height of A 1.70 m person (1.7 m). This is a ratio of the labelled linear dimensions. It does not describe weight, area or volume.
Use the interactive comparison to see both drawings on one shared scale. You can choose another reference or enter your own height. If the sizes are very far apart, the smaller object may be almost invisible; an intermediate reference makes the progression easier to inspect.
Measurement source
Natural History Museum, London
The note above explains the specific value selected. Drawings are schematic; the stated measurement determines the scale. Report a measurement issue.
Check the convention
Fossil-based dimensions are reconstruction estimates. Another specimen or scientific interpretation may give a different value.
Read our methodology for the selection and scoring rules. Practise these dimensions in the dinosaurs size guessing game.