In Genesis, what length is given for Noah’s Ark?

In Genesis, Noah’s Ark is described as 300 cubits long. Genesis 6:15 gives the vessel’s dimensions as 300 cubits in length, 50 cubits in width, and 30 cubits in height. The passage uses the ancient unit called the cubit rather than a modern measurement.

A cubit generally represented the distance from a person’s elbow to the tip of the middle finger, so its exact length varied across cultures and periods. Common estimates place a cubit at roughly 45 to 52 centimetres, which would make 300 cubits approximately 135 to 156 metres. The biblical text itself does not settle the conversion precisely.

The proportions produce a long, relatively narrow rectangular vessel. Modern discussions often compare those proportions with stable barge-like designs, although Genesis does not present the Ark as a ship intended for navigation. Its stated purpose is survival during the flood.

The dimensions are among the clearest numerical details in the Ark account, alongside the 50-cubit width and 30-cubit height.