In the Book of Genesis, how old was Noah when the Flood began around him?

In the Book of Genesis, Noah was 600 years old when the Flood began around him.

Genesis states that Noah entered the ark with his wife, his sons, and his sons’ wives when he was six hundred years old. The age is part of the biblical chronology surrounding the Flood narrative, rather than a modern historical date.

Noah’s three sons are named Shem, Ham, and Japheth. Genesis presents Noah as the father of these sons before the Flood, and their families as the human survivors who left the ark afterward. The account also describes Noah as a righteous man who followed God’s instructions to build the vessel.

A common mix-up is confusing Noah’s age at the Flood with his age when his sons were born. Genesis gives different ages for those events, and it says Noah lived for 950 years in total. The number 600 specifically refers to the beginning of the Flood.