In Genesis, what was the length of Noah’s Ark measured in cubits?

In Genesis, Noah’s Ark was 300 cubits long.

Genesis 6:15 gives the ark’s three principal dimensions as 300 cubits in length, 50 cubits in width, and 30 cubits in height. The text does not define the exact length of the cubit, an ancient unit generally based on the distance from the elbow to the fingertip. Estimates vary by culture and period, so converting 300 cubits into modern metres or feet produces approximate results rather than one universally certain measurement.

The ark’s proportions are often compared with a long rectangular vessel. Its length-to-width ratio in the Genesis description is 6:1, a shape that would emphasize stability rather than speed. The narrative says the vessel had compartments, a roof, and multiple levels, but it does not describe a steering system or propulsion.

Modern replicas sometimes choose a particular cubit length and build to scale. Those projects illustrate the text; they do not settle which historical cubit, if any, Genesis intended.