Gandalf is portrayed in The Lord of the Rings as being a very aged figure, but how old is the wise and powerful wizard, and what evidence is there?

Exactly how old is Gandalf, and what evidence is there for his age throughout Tolkien's original texts and Peter Jackson's cinematic adaptation of The Lord of the Rings? The world of Middle-earth in Tolkien's fantasy masterpiece is home to many ancient and powerful characters, and the wizard is counted among them. Does his age change or fluctuate at all, and is it affected by his transformation from Gandalf the Grey to Gandalf the White following his death at the hands of the Balrog in the Mines of Moria?

Jackson's cinematic epic masterfully retells Tolkien's archetypal fantasy story in a brilliant way and brings its characters to life with outstanding accuracy. Audiences were able to see Gandalf the wizard come to life through Sir Ian McKellen's Oscar-worthy performance, complete with kindness, empathy, and wisdom aplenty. As friendly as he is powerful, Gandalf partners with the Hobbits to take down both dragons and Dark Lords. His affinity for the Shire is well-documented, and the wizard boasts a grandparent-like quality that is both charming and effective.

As an Istari, or wizard, Gandalf is one of an immortal race of beings that was initially sent to Middle-earth to combat the rise of Sauron to power once again. Alongside Saruman the White, Radagast the Brown, and the Blue Wizards who traveled east before the War of the Ring, Gandalf took the human form of an aged and wise man, complete with colored robes and staff to match. His age is never fully revealed in the movies, and it's hard to figure out, even with a cohesive timeline between the events of the two Lord of the Rings trilogies. However, there's a good indication of exactly how long Gandalf has been living in the world of Men thanks to a single line of dialogue from The Two Towers. 

At that point, the powerful wizard is leaving Edoras to seek out the Rohirrim prior to an epic showdown with Saruman's army before the walls of Helm's Deep. As he prepares to ride out, Gandalf utters the following line: "300 lives of men I've walked this earth, and now I have no time." As with almost everything in Middle-earth, interpreting this line is no easy feat.

Númenóreans and Dúnedain Men such as Aragorn were blessed with long lives, and those of royal blood were granted even longer lives. All different races and backgrounds within the world of Men live for different periods of time. However, taking what Gandalf says at face value given his current location and the fact that he has spent much of his physical life in Middle-earth suggests that Gandalf is talking about normal Men here, such as Gondorians and the Rohirrim. The average age of Men is approximately eighty years old, which gives an excellent indication of how old Gandalf is in his physical form.

The closest approximation of Gandalf's physical age is 24,000 years old, according to Gandalf himself. Yet, various dates of key events in other Tolkien texts show that Gandalf has actually only walked in his physical form for just over two thousand years. Given his status as a Maia, or Spirit, Gandalf actually predates the world (Arda) and the universe (Ëa) as a whole in The Lord of the Rings. The question is essentially unanswerable, but we know one thing for certain: Gandalf has always been, and will always be, an angel-like force for good in Middle-earth.

More: Lord of the Rings: How Gandalf The Grey & White Are Different