Find your traditional Korean age, international age and counting age — updated for the 2023 law change
In the traditional Korean age system, a baby is already 1 year old on the day they are born, and everyone in the country becomes one year older together on January 1st — not on their individual birthday. The result: your Korean age is always 1 or 2 years higher than your international age. If your birthday has not yet arrived this year, the difference is 2 years; after your birthday it drops to 1 year.
This calculator shows three numbers at once: your traditional Korean age (birth year counting, +1 at birth), your international age (the system now officially used in South Korea), and the counting age or "year age" (current year minus birth year), which was previously used for things like military conscription and school entry.
On June 28, 2023, South Korea officially switched to the international age system for legal, medical and administrative purposes, ending decades of having three parallel age systems. In practice, though, traditional Korean age is still very common in daily life — K-drama fans, K-pop followers and anyone with Korean friends will keep hearing it. That's exactly why people search for their Korean age: to understand how age is spoken about socially in Korea versus what appears on official documents. Enter your date of birth above and get all three ages instantly — the calculation runs entirely in your browser and nothing is stored.