This Korean age calculator shows your age in all three Korean age systems at once: 만 나이 (international age), 세는 나이 (Korean counting age) and 연 나이 (year age). Enter your birthdate to see each number, with a short note on when Koreans use it.

FAQ

What is my Korean age?

It depends on which system you mean. 만 나이 counts from your actual birthdate — the age on ID cards, contracts and official documents. 세는 나이 starts at 1 when you are born, and everyone gains a year together on January 1st. 연 나이 is the current year minus your birth year, with no birthday needed.

Do Koreans still use Korean age?

Since June 28, 2023, under the Age Unification Act (만 나이 통일법), 만 나이 is the single legal standard, except a few laws that still use 연 나이. 세는 나이 hasn't disappeared — you'll still hear Koreans ask each other's age the traditional way in casual conversation.

Which Korean age is used for the drinking age and military service?

연 나이 — the current year minus your birth year, with no birthday needed. Korean law uses it for things like the legal drinking and smoking age and the military service age.

Hear Korean age come up in a real conversation: Podcast Ep.7 — Why Koreans Stopped Getting Married →