What measurements does Genesis give for Noah’s Ark?

Genesis gives Noah’s Ark dimensions as 300 by 50 by 30 cubits.

Genesis 6:15 records the Ark’s length as 300 cubits, its width as 50 cubits, and its height as 30 cubits. The biblical text does not define the cubit’s exact modern equivalent, so conversions vary. Using a common estimate of about 45 centimeters, the Ark would have been roughly 135 meters long, 22.5 meters wide, and 13.5 meters high.

The dimensions describe a large rectangular vessel built for survival during the Flood, not a conventional sailing ship. Genesis also describes three decks, rooms, and an opening near the top. The text does not provide a complete engineering plan or specify the precise location of every feature.

Popular illustrations often make the Ark look like a boat with a pointed bow. Genesis’ measurements instead emphasize a long, boxlike structure. The dimensions are therefore among the clearest quantitative details in the story, while modern reconstructions necessarily add assumptions not stated in Genesis.