Noah's Ark, according to the Bible (Genesis 6:15), was given the dimensions of 300 cubits long, 50 cubits wide, and 30 cubits high. The exact size in modern measurements depends on the length of the cubit used, which varied in ancient times. Using a common estimate of a cubit as about 18 inches (46 cm):

• Length: approximately 450 feet (135 meters)
• Width: approximately 75 feet (23 meters)
• Height: approximately 45 feet (14 meters)

Another common measure is the "royal cubit," about 20.4 inches, which would make the ark about:

• Length: 510 feet (155 meters)
• Width: 85 feet (26 meters)
• Height: 51 feet (16 meters)

This would make the ark's volume roughly 1.88 million cubic feet, enough to hold a very large amount of cargo, including animals and food.

In summary, Noah's Ark was a massive wooden vessel roughly around 450-510 feet long, 75-85 feet wide, and 45-51 feet tall, depending on the cubit measurement used.