Korean Age Calculator

In the Korean system, you start at 1 (counting time in the womb) and age up on January 1st, not your birthday. So a baby born on December 31st would be 2 in Korean age just one day later on January 1st.

In June 2023, South Korea officially adopted the international age system for legal and administrative purposes. However, Korean age (만 나이) is still commonly used in everyday social contexts.

If your birthday has passed this year: Korean age = international age + 1. If your birthday hasn't passed yet: Korean age = international age + 2. This calculator does the conversion automatically.