In Genesis, how many years old was Noah when the floodwaters came over the earth?

In Genesis, Noah was 600 years old when the floodwaters came over the earth.

Genesis 7:6 gives Noah’s age at the beginning of the Flood. The number is part of the biblical chronology surrounding Noah, his family, the construction of the ark, and the destruction of the world described in the story.

The age is sometimes confused with Noah’s total lifespan. Genesis 9:29 says Noah lived 950 years, so 600 marks the Flood’s beginning rather than his death. Genesis also gives ages for other patriarchs, making Noah’s age part of a wider genealogical sequence.

The figure belongs specifically to the Genesis account. Other flood traditions use different characters, timelines, and numerical details, so the answer should not be transferred to stories such as the Epic of Gilgamesh.