According to Genesis, what were the biblical Ark's stated dimensions in cubits?

According to Genesis, the biblical Ark’s stated dimensions were 300 by 50 by 30 cubits.

Genesis 6:15 gives the three measurements in that order: length, width, and height. A cubit was an ancient unit based approximately on the length of a forearm, but its exact historical value varied. For that reason, converting the Ark’s dimensions into modern metres or feet produces estimates rather than one universally fixed answer.

Using a common cubit estimate of about 45 centimetres gives roughly 135 metres long, 22.5 metres wide, and 13.5 metres high. The passage also describes three decks, a side door, and a roof or opening, though translations differ over some architectural details.

The proportions have attracted modern comparisons with large boats, but Genesis presents the measurements as part of a sacred narrative, not as a modern engineering specification. Ancient readers would have recognized the cubit as the practical measuring unit of the story’s world.