In the biblical account of Noah's Ark, the ark was 50 cubits wide.
Genesis 6:15 records the vessel's dimensions as 300 cubits long, 50 cubits wide, and 30 cubits high. These figures form a simple proportion of 10:5:1 for length, width, and height.
Because the cubit was an ancient unit rather than a fixed modern measurement, the ark's estimated width depends on which cubit is used. At approximately 45 centimeters per cubit, 50 cubits would equal about 22.5 meters, or 75 feet.
The width is sometimes confused with the height because all three figures appear together in the same verse. The narrative also says the ark had multiple decks and was coated with pitch, but it does not provide a modern engineering plan or a precise cubit standard.