In Genesis, what was the total length of Noah's Ark 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. Because the ancient cubit was based roughly on the length of a forearm, its exact modern equivalent varies. Using common estimates, 300 cubits is often calculated at roughly 135 metres or 450 feet, but the precise conversion is not certain.

The proportions make the ark six times longer than its width and ten times longer than its height. Modern naval discussions sometimes note that such proportions resemble a stable barge more than a fast ship, although Genesis does not describe the ark as a vessel intended to sail under human control.

The text emphasizes survival during the flood, not navigation. It mentions a door, rooms, a roof or opening, and multiple levels, but it does not give a detailed construction blueprint.