Native Korean Numbers and Counters: Count Like a Local
Native Korean numbers 하나, 둘, 셋 pair with counters 개, 명, 잔 — and the first four change shape: 한 개, 두 잔. Learn the rule plus when to use native vs sino.
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Written by Alvin Lim Certified Korean Language Teacher (Level 2)
Native Korean numbers — 하나, 둘, 셋 — are the numbers Koreans count real things with: cups of coffee, people, animals, and their own age. Pair them with a small set of counters, apply one shape-change rule, and you can order anything in a café. Prices and dates use the other system, which you met in Lesson 7: sino-Korean numbers.
Native numbers 1–10 (and 20)
Korean runs two number systems side by side. This is the native set — learn it as a chant, the way Korean kids do:
For 11–19, stack onto 열: 열하나 (11), 열둘 (12), 열셋 (13)… You rarely need native numbers beyond the twenties, because from 100 the sino system takes over completely.
The shape-change rule: 한, 두, 세, 네
Standing alone, count with the full forms: 하나, 둘, 셋, 넷. The moment a counter follows, five numbers shorten: 한 개 (one thing) · 두 잔 (two cups) · 세 명 (three people) · 네 병 (four bottles) · 스무 살 (twenty years old). Everything else stays put: 다섯 잔, 여섯 개, 열 명. The rule travels into compounds — 열하나 becomes 열한 (열한 살) — and note that only exact twenty becomes 스무: twenty-two is 스물두 살, never 스무두.
The six counters you actually need
A counter is a measure word. English has them for a few nouns — two cups of coffee, three sheets of paper — while Korean uses them for almost everything. The order is always noun first, then number plus counter:
개 gae — things: 사과 한 개 (one apple) · 명 myeong — people: 학생 두 명 (two students) · 잔 jan — cups and glasses: 커피 세 잔 (three coffees) · 병 byeong — bottles: 물 네 병 (four bottles of water) · 살 sal — years of age: 스무 살 (twenty years old) · 마리 mari — animals: 고양이 두 마리 (two cats)
커피 두 잔 (coffee, two cups) — never 두 커피. To ask how many, swap the number for 몇: 몇 개예요? (how many things?) · 몇 명이에요? (how many people?) · 몇 살이에요? (how old are you?). Answer with a native number: 다섯 개예요, 스무 살이에요.
Native or sino? The one-line cheat
If you can point at the items and count them one by one — apples, people, cats, candles on a cake — it is native + counter. If you are reading digits off something — a price tag, a phone number, a calendar — it is sino. That is why your age is 스무 살 (native) but the price of the cake is 이만 원 (sino). The full sino tour, money included, lives in Lesson 7.
Order two coffees
One transaction, both systems: you counted the cups with a native number (두 잔), and the price came back in sino (구천 원). After a week of café visits the split feels automatic.
Two things you will meet immediately in Korea. First, restaurant staff greet you with 몇 분이세요? (how many people?) — 분 is the honorific counter for people, a notch politer than 명. Second, age comes up early and often; it is not rude, it is how Koreans work out how politely to speak to each other. Since the 2023 law unified age counting, your answer to 몇 살이에요? is simply your real age plus 살: 스물세 살이에요.
FAQ
Do native Korean numbers go above 99? In modern Korean, native numbers effectively stop at 99 (아흔아홉). From 100 everything switches to sino numbers (백, 천, 만) — one more reason prices, years, and big quantities all live in the sino system.
Is it 한 개 or 하나 개? Always 한 개. Five native numbers change shape before a counter: 하나→한, 둘→두, 셋→세, 넷→네, 스물→스무. Counting with nothing after the number keeps the full forms: 하나, 둘, 셋…
Do Koreans still use “Korean age”? Officially, no — since June 2023 Korea uses international age (만 나이) by law, so 스무 살 means the same twenty as in your country. You will still hear older speakers add 만 for clarity, and the age question itself (몇 살이에요?) remains completely normal small talk.
Next: Telling time in Korean. Previous: Sino-Korean numbers. Full path: curriculum hub.