According to Genesis, what was the longest dimension of Noah’s Ark?

According to Genesis, the longest dimension of Noah’s Ark was 300 cubits.

Genesis 6:15 gives the vessel’s measurements as 300 cubits in length, 50 cubits in width, and 30 cubits in height. A cubit was an ancient unit traditionally related to the length of a forearm, but its exact value varied by culture and period. For that reason, translations usually retain “cubits” rather than claiming a single precise metric size.

Using a common estimate of about 45 centimeters per cubit would make the ark roughly 135 meters long, 22.5 meters wide, and 13.5 meters high. Those modern conversions are approximations, not measurements stated by Genesis.

The proportions are notably elongated, giving the ark a broad, stable hull rather than the shape of a fast ship. Genesis also mentions three decks and a roof, details that add to the vessel’s described structure.