According to Genesis, Noah becomes the father of his sons at age 500.
Genesis 5:32 states that Noah is 500 years old when he fathers Shem, Ham, and Japheth. The verse introduces the three sons together, without explaining their precise birth order. Later passages list their names in varying orders, so the text does not establish a simple chronological ranking from every list.
Genesis later says Noah is 600 years old when the Flood comes. That creates a ten-year interval between the statement about his sons’ births and the Flood account, though the narrative does not provide a complete year-by-year family chronology.
Noah’s lifespan is given as 950 years in Genesis 9:29. These ages belong to the biblical genealogy and narrative chronology, not to independently documented historical records.