Aang is 12 years old physically in Avatar: The Last Airbender , but 112 years old chronologically because he was frozen in an iceberg for 100 years.

How old is Aang in Avatar?

  • At the start of the series, Aang is biologically 12 years old, since he was that age when he got trapped in the iceberg.
  • Because he spent a century frozen in suspended animation, his chronological age is 112 when Katara and Sokka find him.
  • By the end of the original series (about a year later in-universe), he is still generally treated as 12, or at most just turning 13.

So when fans ask “how old is Aang in Avatar?”, the usual answer is: 12 (or 112, if you count the iceberg years).

Bottom note: Information gathered from public forums or data available on the internet and portrayed here.