What are the traditional dimensions of Noah’s Ark in Genesis?

Genesis gives Noah’s Ark dimensions of 300 by 50 by 30 cubits. Genesis 6:15 lists the length, width, and height in that order.

A cubit was an ancient unit based approximately on the length of a forearm, but its exact historical value varied. 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. These modern conversions are approximate because the biblical cubit is not defined precisely in the passage.

The stated proportions produce a long, rectangular vessel rather than the rounded shape often seen in paintings. Genesis also describes multiple decks, rooms, a roof, and an opening or window. The text gives dimensions, but it does not provide a complete engineering plan or explain how the Ark was constructed in technical detail.