According to Genesis, what was the width of Noah's Ark?

According to Genesis, Noah's Ark was 50 cubits wide.

Genesis 6:15 gives the Ark's three principal dimensions: 300 cubits in length, 50 cubits in width, and 30 cubits in height. The biblical text uses cubits rather than a modern standardized unit, so the exact metric conversion depends on which historical cubit is assumed.

The width is therefore a precise textual measurement even though its modern equivalent is uncertain. A commonly used cubit estimate would put 50 cubits at roughly 22 to 25 metres, but that conversion should be treated as approximate rather than exact.

The same construction passage specifies three decks, compartments, and an opening near the top. The proportions—six times as long as the Ark was wide and ten times as long as it was high—are often noted in discussions of the vessel's design.