According to Genesis, what were the Ark’s length, width, and height in cubits?

According to Genesis, Noah’s Ark measured 300 by 50 by 30 cubits.

Genesis 6:15 gives the Ark’s dimensions while God instructs Noah to build it before the Flood. The text uses the ancient cubit, a unit generally based on the length of a forearm, so the exact modern conversion is uncertain. Depending on the cubit standard used, the Ark would have been roughly 135 metres long, 22 metres wide, and 13 metres high, though estimates vary.

The proportions make the vessel about six times longer than it was wide. Naval architects have noted that this broad, rectangular design would prioritize stability rather than speed or maneuverability. The biblical account does not describe a pointed bow, sails, or a rudder.

These dimensions belong to the Genesis narrative and should not be confused with measurements claimed for later replicas. The Ark Encounter attraction in Kentucky, for example, is built to the Genesis dimensions using a modern interpretation of the cubit.