How high does Genesis say Noah's Ark was?

Genesis says Noah's Ark was 30 cubits high.

Genesis 6:15 lists the vessel's height together with its length and width: 30 cubits high, 300 cubits long, and 50 cubits wide. Depending on the cubit used, 30 cubits is often estimated at roughly 13.5 metres, or about 45 feet, though no single modern conversion is certain.

The narrative also says the ark had three decks. That detail helps explain why the height is presented as a substantial vertical dimension rather than merely the height of a small boat. The text describes a window and an entrance as well, although translations and interpretations differ over some construction details.

A common mix-up is to assign 50 cubits to the height. In Genesis, 50 cubits is the width, while 30 cubits is the height. These measurements are traditional textual details, not independently confirmed engineering data.