How old is Sukuna in human years?

Sukuna’s exact age in human years is not clearly stated in Jujutsu Kaisen, but he is believed to be over 1,000 years old. He was originally a human sorcerer, and during his human life, he was known as the "King of Curses." After his death, he became a cursed spirit, and his power grew exponentially over time.

The timeline suggests that Sukuna lived during the Golden Age of Jujutsu Sorcery, which occurred well over a millennium ago. His reputation as one of the most powerful curses and his transformation into a cursed spirit has kept him alive and feared, even after such a long period.

In short, Sukuna is several centuries old, possibly close to a thousand years or more, though his human age would be significantly less than that since he was a sorcerer before becoming a curse.

For more details, you can visit his page on Jujutsu Kaisen Wiki.