In Genesis, the opening in Noah’s Ark is described as one cubit high.
Genesis 6:16 tells Noah to make a window or opening for the Ark and to finish it to one cubit. Translation traditions differ over the precise architectural term: some versions say “window,” while others describe an opening, roof structure, or skylight. The measurement itself is commonly rendered as one cubit.
This instruction follows the Ark’s overall dimensions and its division into rooms and levels. The passage also places a door in the side of the vessel. Together, these details present the Ark as an enclosed structure with controlled access and a source of light or ventilation.
The verse is not describing the Ark’s total height; Genesis gives that separately as 30 cubits. Confusing the one-cubit opening with the vessel’s height is a common reading error. The answer refers specifically to the opening mentioned in Genesis 6:16.