According to Genesis, how old was Noah when the Flood waters came upon the earth?

According to Genesis, Noah was 600 years old when the Flood waters came upon the earth.

Genesis 7:6 states that Noah was six hundred years old when the waters of the Flood came upon the earth. The figure belongs to the Flood chronology and is distinct from the statement later in Genesis that Noah lived to be 950 years old. It also differs from the age references connected with the births of his sons.

The narrative gives Noah’s age as part of a broader genealogical framework. Genesis identifies Noah as the son of Lamech and places the Flood within the long lifespans attributed to figures in the antediluvian genealogy. These ages are presented by the biblical text as chronological data, not as estimates.

A frequent mistake is to answer 950, because that is Noah’s total lifespan in Genesis 9:29. The question asks specifically about Noah’s age when the Flood began, and Genesis 7:6 supplies the answer: 600 years.