How Old Are You in Korean — and Why It Comes Up So Fast

"How old are you?" in Korean is 몇 살이에요? (myeot sal-i-e-yo?) — casual-polite, fine for peers. For anyone older, use the more respectful 나이가 어떻게 되세요?, and for elders, swap in 연세, the honorific word for age: 연세가 어떻게 되세요? Koreans ask early because your age decides the speech level and kinship term the whole conversation runs on.

In most languages, asking someone's age within five minutes of meeting them is a little rude. In Korean, not asking is the strange move.

That's because age isn't small talk here — it's the variable that decides whether you speak 반말 (banmal, casual) or 존댓말 (jondaetmal, polite), and whether you get to call the person across the table 오빠, 형, or nothing at all. Skip the question and you're both guessing at grammar for the rest of the conversation.

The age-asking ladder: 몇 살 vs 나이가 vs 연세가

Notice 연세가 어떻게 되세요? doesn't just add politeness to the verb — it swaps the noun itself. 나이 is the plain word for "age"; 연세 is reserved for people old enough to outrank you by default, roughly grandparent-and-up. Using 나이 on a grandmother isn't offensive exactly, but it's the linguistic equivalent of forgetting to bow.

Why they ask in minute one — it's grammar, not nosiness

Korean requires you to pick a formality level before your first full sentence, and picking it correctly requires knowing who's older. Age also unlocks kinship terms that stand in for names: a woman calls an older guy 오빠, a man calls him 형; a younger person calls an older woman 언니 or 누나 depending on their own gender. (Full breakdown in Hyung, Noona, Unnie, Oppa.) None of that works until someone's age is on the table.

It also settles smaller things nobody mentions out loud — who pours the drink first, who speaks first at dinner, who picks up the check. A single year of difference can shift all of it. That's a lot of social software running on one number, which is exactly why Koreans ask for it fast instead of guessing.

Answering: native numbers, 살, and the law that changed the math

Spoken answers use native Korean numbers plus the counter 살: 스물다섯 살이에요 (seu-mul-da-seot sal-i-e-yo, "I'm 25"). Formal or written contexts sometimes use Sino-Korean numbers with 세 instead (이십오 세), but almost nobody says that out loud in conversation — it reads like a form, not a sentence.

Here's the part that trips up even fluent learners: which 25 is it? Korea ran three overlapping age systems for decades, and the answer to "how old are you" genuinely depended on which one someone meant.

Deflecting, asking back, and the 동갑 moment

Not everyone wants to answer, and Korean has polite outs for that too: 비밀이에요 (bi-mil-i-e-yo, "it's a secret") delivered with a smile, or the playful 나이는 왜 물어보세요? (na-i-neun wae mu-reo-bo-se-yo?, "why do you ask?"). Both read as coy, not evasive — nobody assumes you're hiding something scandalous.

Asking back is standard practice — 그쪽은요? (geu-jjok-eun-yo?, "and you?") — and if the numbers match, you'll hear the best word in the whole exchange: 동갑 (dong-gap, "same age"). Discovering you're 동갑 with someone is a small social event. It flattens the hierarchy instantly and is the single fastest route to becoming 친구 — read more in Friend in Korean, which covers why 친구 technically requires the same birth year.