In the biblical Noah’s Ark account, what was the ark’s length in cubits?

In the biblical Noah’s Ark account, the ark’s length was 300 cubits. Genesis 6:15 gives the ark’s three principal dimensions as 300 cubits long, 50 cubits wide, and 30 cubits high. The measurement is stated before the flood narrative describes the animals and Noah’s household entering.

A cubit was an ancient unit based broadly on the length of the forearm, so its exact modern equivalent is uncertain. Depending on the convention used, 300 cubits is often estimated at roughly 135 to 150 metres, or about 450 to 500 feet. The biblical text itself does not specify which cubit standard it assumes.

The ark’s proportions are often discussed in connection with stability. Its length-to-width ratio is 6:1, a shape that resembles a large barge more than a conventional ship. That comparison concerns the story’s stated dimensions, not proof that a historical ark has been found.