What length does Genesis assign to Noah’s Ark?

Genesis assigns Noah’s Ark a length of 300 cubits.

Genesis 6:15 gives three dimensions for the vessel: 300 cubits long, 50 cubits wide, and 30 cubits high. The text uses the ancient unit called a cubit, traditionally associated with the distance from an adult’s elbow to the tip of the middle finger. Since cubit standards varied, converting the Ark’s length into metres or feet produces estimates rather than one universally certain modern measurement.

Using a common estimate of roughly 45 centimetres per cubit would make the Ark about 135 metres long, though historical cubits could differ. The dimensions have inspired comparisons with large ships and modern replicas, but Genesis does not provide a complete naval blueprint. It also does not state the exact shape of the hull beyond the listed measurements and the instruction to make rooms inside the vessel.