Why Do Koreans Ask Your Age? What It Means and How to Answer

Koreans usually ask your age so they know how to talk to you: which level of politeness to use and what to call each other. It is rarely a judgment. Give your age or birth year, or skip the question with a smile — both are fine.

The question often comes early, sometimes before your job or hometown. Once you know what it does in Korean, it stops feeling personal. This guide explains what people want to know, how to answer in English or Korean, and which “age” counts after Korea’s 2023 law change.

The short answer

Why they ask → grammar and relationships: Korean speech changes with the listener’s age and your relationship. Age helps people choose forms of address and discuss whether to speak casually. Keep polite speech with a new acquaintance until you agree otherwise.
What they want → often your birth year: Koreans compare ages by birth year, so 몇 년생이에요? (“What year were you born?”) is common. People born in the same year are 동갑 — the same age — regardless of birthday.
How to answer → keep it simple: “I’m 29” or “I was born in 1997” works. You can also decline lightly. Nobody expects a foreign visitor to know every rule.
Which age counts → international age: Since June 28, 2023, Korean law uses international age for most purposes. Alcohol and tobacco sales still use a year-based rule, so check the section below if you are 18 or 19.

Two friends looking at a phone together at a cafe. — Two friends sharing a coffee break.

It is about grammar, not nosiness

Korean has polite and casual ways to say almost everything. 존댓말 (jon-daen-mal) is polite speech, usually ending in -요 or -니다. 반말 (ban-mal) is casual speech between close friends, or from an older person to a younger one. “Did you eat?” has these polite and casual forms:밥 먹었어요?bahm muh-guh-ssuh-yo?Did you eat? (polite)밥 먹었어?bahm muh-guh-ssuh?Did you eat? (casual)

With strangers, most adults use polite speech whatever their age. Age starts to matter when a relationship forms — classmates, coworkers, a friend’s friend, a language-exchange partner. At that point people want to know who can switch to casual speech first and how to address each other. Asking your age is the fastest way to settle that.

Age also decides the family-style titles Koreans use with people they are close to:

형 (hyuhng) and 오빠 (o-ppa): an older man, called by a younger man (형) or a younger woman (오빠).
누나 (noo-na) and 언니 (uhn-nee): an older woman, called by a younger man (누나) or a younger woman (언니).
선배 (suhn-bae) and 후배 (hoo-bae): someone ahead of or behind you at school or work. Here the start year matters more than age.

As a visitor, you do not have to use these titles. Most Koreans will use your name with foreigners. Polite speech plus someone’s name is a safe default until they suggest something else.

Why birth year matters more than birthday

Koreans go through school in year groups, so people usually think of age as a birth year rather than a number that changes on a birthday. Two people born in 1997 are 동갑 (same age), even if one was born in January and the other in December. That is why the follow-up question is often “What year were you born?” rather than “When is your birthday?”

You may also hear about 빠른 년생 (ppa-reun nyuhn-saeng, “early-born”). Under the old school-entry cutoff, children born in January or February normally entered school with children born in the preceding calendar year. Some of them identify with the older year group, which can make “Are we the same age?” an honest puzzle. The cutoff changed for children entering school in 2009; those born in January or February 2002 were the last cohort under the old rule.

An illuminated storefront sign reading SOJU & BEER. — A soju-and-beer sign in Wangsimni, Seoul.

What changes once they know your age

If you are the same age

You may hear 동갑이네요! (“We’re the same age!”) and an offer to speak casually. Among Koreans, that often marks the start of a friendship. It is fine to accept or to stay polite.

If you are younger

Keep using polite speech until the older person invites you to relax, for example with 말 편하게 하세요 (“Feel free to speak casually”). At a drinking table, the younger person often pours for the older one — our Korean drinking etiquette guide covers pouring and turning your head when you drink.

If you are older

The other person may keep polite speech with you even after you become friends. Some groups expect the oldest person to pay more often, but this varies widely; do not assume it, and do not be surprised if someone offers.

Korean age, international age and the 2023 law

You may have heard of “Korean age.” In that traditional count, a newborn was one year old and everyone added a year on January 1. Official documents had long used international age, but everyday life mixed several systems, which caused confusion. A law that took effect on June 28, 2023 made international age (만 나이, man na-ee) the standard for administrative and civil matters.

Some rules still use a year-based count: your birth year alone decides.

Alcohol and tobacco: sales are allowed from January 1 of the year you turn 19. A 19th birthday in November does not matter; the year does. Our drinking etiquette guide explains ID checks.
Military service and school entry: Korean conscription and elementary-school entry are also based on birth year.

Everyday conversation can still mix the systems. In an online government survey of 22,226 respondents (October 30–November 12, 2023), 95.8% knew about the law and 88.5% said they intended to use international age in daily life. That measures intention, not a completed switch in everyone’s habits. Giving your birth year avoids a mismatch when someone still uses the old count.

How to answer (with Korean)

In English, “I’m 29” or “I was born in 1997” is perfect. If you want to answer in Korean, note one twist: ages use native Korean numbers (스물 for 20, 서른 for 30), while years use Sino-Korean numbers. Pronunciations below are approximate.

몇 살이에요?myuht ssa-ree-eh-yo?How old are you?

나이가 어떻게 되세요?na-ee-ga uh-ttuh-keh dweh-seh-yo?May I ask how old you are? (more polite)

몇 년생이에요?myuhn nyuhn-saeng-ee-eh-yo?What year were you born?

스물아홉 살이에요.seu-moo-ra-hop ssa-ree-eh-yo.I’m 29.

97년생이에요.goo-chil-lyuhn-saeng-ee-eh-yo.I was born in ’97.

동갑이네요!dong-ga-bee-neh-yo!We’re the same age!

말 편하게 하세요.mal pyuhn-ha-geh ha-seh-yo.Feel free to speak casually (to me).

If you would rather not say

You are not obliged to share your age. With a stranger — a shop owner, a taxi driver, someone at a bar — a light deflection is normal: “Guess!”, “Younger than I look,” or simply changing the subject. The question is usually a social tool, not a test, so a friendly non-answer rarely causes offence.

In a relationship that will continue, such as a new coworker or a regular language partner, sharing at least your birth year makes things easier for the other person, because they can stop worrying about speaking to you incorrectly. If a question about age comes with a comment you did not like — about marriage, for example — it is fine to say, kindly, that people don’t ask that so soon where you are from.

If Korean politeness feels like a lot to learn at once, start with our guide to getting by in Korea without speaking Korean.