Korean Age Calculator

Koreans traditionally counted age differently — you were 1 at birth and everyone aged up together on January 1st. Enter your birthday to see all three systems.

Your date of birth

ℹ️ Since June 2023, Korean law officially uses international age (만 나이) for legal and administrative purposes. The traditional "Korean age" (세는 나이) still pops up in casual conversation, and "year age" (연나이 = this year − birth year) is still used for a few specific laws like conscription and the legal drinking/smoking age (you can drink in Korea from January 1st of the year you turn 19 internationally).