In Genesis, what length does Noah’s Ark have in cubits?

In Genesis, Noah’s Ark is described as 300 cubits long.

Genesis 6:15 gives the Ark’s three principal dimensions as 300 cubits in length, 50 cubits in width, and 30 cubits in height. A cubit was an ancient unit based approximately on the length of a forearm, so its exact modern equivalent is uncertain. Depending on the cubit used, the Ark’s stated length is commonly estimated at roughly 135 to 157 metres.

The dimensions form a long, rectangular vessel rather than a ship designed for speed or navigation. Genesis says the Ark had rooms, a roof, and several levels, but it does not provide a complete construction plan. The measurements therefore belong to the biblical narrative, not to a surviving archaeological blueprint.

The 300-cubit length is sometimes confused with the Ark’s height or width. The other two measurements are 50 cubits wide and 30 cubits high, making length the largest of the three stated dimensions.