In the Noah’s Ark story, how long was the ark according to Genesis?

In the Noah’s Ark story, Genesis says the ark was 300 cubits long.

Genesis 6:15 gives three dimensions: 300 cubits in length, 50 cubits in width, and 30 cubits in height. A cubit was an ancient unit commonly related to the length of a forearm, but its exact value varied by culture and period. For that reason, converting the ark’s dimensions into modern metres produces estimates rather than one universally certain measurement.

Using a common cubit of about 45 centimetres, the ark would have been roughly 135 metres long, 23 metres wide, and 14 metres high. Some reconstructions use a longer cubit and therefore produce larger figures.

The biblical text presents the ark as a large rectangular vessel with three decks. These dimensions are part of the Genesis account and should not be confused with measurements claimed for modern replica projects.