What were the stated dimensions of Noah's Ark in cubits?

Genesis gives Noah's Ark dimensions of 300 by 50 by 30 cubits.

Genesis 6:15 specifies the Ark's length as 300 cubits, its width as 50 cubits, and its height as 30 cubits. The text presents these measurements as construction instructions, along with the Ark's three decks, rooms, and a covering or opening near the top.

A cubit was an ancient unit generally based on the length of a forearm, so its exact modern equivalent is uncertain. Using common estimates, the Ark would have been roughly 135 metres long, 23 metres wide, and 14 metres high, but conversions vary because ancient cubits were not universally identical.

The proportions make the Ark a long, box-like vessel rather than a conventional sailing ship. Genesis does not describe a rudder, sails, or a propulsion system. Its stated purpose is survival through the flood, not travel under human control.