The age of Hades, the Greek god of the underworld, is not explicitly defined in ancient texts. In Greek mythology, many gods, including Hades, are often considered to be immortal and do not age in the same way humans do. They exist outside of the normal constraints of time and do not experience aging like mortals.
Hades is the brother of Zeus and Poseidon, and all three are said to have been born from the Titans Cronus and Rhea. If we consider the timeline of Greek mythology, Hades has been around since the beginning of the universe in those myths. Therefore, while we can’t assign him a specific age, we can understand that as a god, he exists beyond the concept of age.