What was the Ark’s length in cubits according to Genesis 6:15?

Genesis 6:15 gives Noah’s Ark a length of 300 cubits.

The same verse specifies a width of 50 cubits and a height of 30 cubits. These proportions make the ark a long, rectangular vessel in the biblical description. Genesis does not define the cubit’s exact length, so converting 300 cubits into metres or feet requires choosing an assumed ancient measurement.

Many estimates place a cubit somewhere around 44–52 centimetres, which would make the ark roughly 132–156 metres long. Such conversions are approximate rather than measurements stated by the text. Modern illustrations and replica projects may use different cubit values and design assumptions.

The dimensions are often compared with shipbuilding, but Genesis gives no complete technical specification, displacement calculation, or evidence that the vessel was intended for powered navigation. Its stated purpose was to preserve Noah, his household, and representatives of living creatures through the flood narrative.