Native Korean Numbers & Counters

By the end of this lesson you can:

• Count from 1 to 99 in native Korean, including the irregular tens 서른 · 마흔 · 쉰 · 예순 · 일흔 · 여든 · 아흔
• Use the five short forms (한 두 세 네 스무) with the 7 essential counters 개 명 잔 권 마리 장 번 to build phrases like 사과 세 개 and 커피 두 잔
• Choose the correct number system for objects, hours, minutes, age, money, and dates, including mixed time expressions like 두 시 삼십 분 (2:30)

TOPIK 1 skills: Numbers & counters

The second number system: older, more irregular, and used for counting real things. Hours, objects, people, animals, and age all live here.

하나 (1) · 둘 (2) · 셋 (3) · 넷 (4) · 다섯 (5) · 열 (10) · 스물 (20)

Lesson objectives

• Learn the native Korean number roots: 1–20, plus the tens 30 · 40 · 50 · 60 · 70 · 80 · 90
• Understand the 5 irregular short forms used before counters (한 두 세 네 스무)
• Learn 7 essential counters: 개 명 잔 권 마리 장 번
• Know exactly when to use native Korean vs Sino-Korean numbers
• Build natural counting phrases: 사과 세 개, 커피 두 잔, 사람 다섯 명

RECALL: Building on Lesson 14. Lesson 14 covered Sino-Korean numbers, the system used for money, dates, and minutes. Today is the second system: Native Korean (고유어 숫자). These are older Korean-origin words used for counting objects, stating hours, and expressing age. Both systems coexist. You need both. This lesson completes the picture.

Part 1 · Two Systems: Side by Side

Same number, two completely different words. 1–10 fully compared. Notice that native Korean numbers are generally longer and less regular than Sino-Korean. They also have short contracted forms used before counters. These appear in Part 3.

TIP: Memory anchor: 여덟 (8) is unusual. It has an invisible final consonant: it looks like it ends in ㄹ but it actually ends in ㄼ (a double consonant cluster). In pronunciation only the ㄹ sounds, giving yeo-deol. It’s one of a small set of words with a silent hidden consonant. Don’t let it throw you off. Just learn the sound: yeo-deol.

Part 2 · The 10 Roots: Drill Cards

하나부터 열까지: One to Ten

Say each number aloud, then check the romanization and the short form used before counters.

열하나 to 스물: 11 through 20

Native Korean teens are formed like Sino-Korean: 열 (10) + unit. But 20 has its own word: 스물 (seu-mul).

Tens beyond 20 (for reference)

These are irregular words: each one is its own root with no pattern. Native Korean numbers are only commonly used up to 99, after which Sino-Korean takes over for most contexts.

Part 3 · The 5 Irregular Short Forms

Before a counter, 4 numbers (and 스물) shorten. When a native Korean number is immediately followed by a counter word, the first four numbers and 스물 contract into shorter forms. This is one of the trickiest parts of the system.

TIP: 5–10 don’t contract at all. Only 하나 둘 셋 넷 and 스물 have short forms. 다섯 개, 여섯 명, 일곱 권: all stay exactly as they are. The short form rule only applies to those five. This is the one irregularity you genuinely need to memorise; everything else is pattern-based.

Part 4 · 단위 명사: Counters

7 essential counter words. Korean uses counter words (similar to “a cup of”, “a piece of” in English) between the noun and the number. Structure: noun + number + counter. Each counter applies to a specific category of thing.

📦 개: general objects

General object counter: things, items. The default counter for most physical objects with no specific counter. When in doubt, 개 is usually safe. Used for apples, tickets, bags, pens, keys (virtually anything tangible).

👤 명: people (neutral)

Person counter: neutral/formal. The standard counter for people. Used in most everyday and formal contexts. (The counter 분 is even more polite, used for elders or VIP guests.) 명 is fine in the vast majority of situations.

☕ 잔: cups & glasses

Cup / glass counter. Used for drinks served in a cup, glass, or mug: coffee, tea, juice, beer. Ordering in a café: [drink] [number + 잔] 주세요. Works for both hot and cold drinks as long as they’re in a vessel.

📚 권: books

Bound volume counter: books, notebooks. Used specifically for bound volumes: books, notebooks, magazines. If it has a spine and pages, it takes 권. This is one of the most frequently tested counters in TOPIK 1 reading passages.

🐱 마리: animals

Animal counter. Used exclusively for animals: fish, dogs, cats, birds, insects, all of them. Never used for people or inanimate objects. Culturally significant: using 명 for an animal or 마리 for a person would sound very strange.

🗒️ 장: flat sheets

Flat sheet counter: paper, tickets, photos. Used for flat, sheet-like items: paper, photographs, playing cards, stickers, tickets (when thought of as paper slips). The key distinction from 권: 장 is for single sheets; 권 is for bound collections of sheets.

🔁 번: times / occurrences

Occurrence counter: times, rounds, attempts. Counts how many times something happens. 한 번 = once · 두 번 = twice · 세 번 = three times. Also used for numbered items: bus number 72 = 72번 버스.

RECALL: 다시 한 번 말해 주세요 (please say it one more time). You already know this phrase from Lesson 13!

MILESTONE: Two number systems complete. Adding native numbers and 7 counters puts your active flashcard deck past 75 items, and unlocks the ability to talk about quantities of almost anything.

Part 5 · 어떤 숫자? (Which System?)

The decision table. This is the most important reference in today’s lesson. When you encounter a number in Korean, you need to know which system it belongs to. Here is the complete guide.

TIP: The one rule that handles most cases: if you’re counting physical things or people with a counter word → Native Korean. If you’re dealing with money, time (minutes), dates, or institutional numbering → Sino-Korean. Hours are the trickiest: hours = Native, minutes = Sino. 두 시 삼십 분 = 2:30. Two different systems in one time expression.

Part 6 · 연습: Counting Practice

Build the full counting phrase, then check the Answer Key. Each item gives you the quantity and thing in English. Construct the complete Korean counting phrase (noun + number + counter). Remember: short forms for 1–4 and 스물. Answers are in the Answer Key at the end of the lesson.

1. one apple
2. two coffees
3. three people
4. four books
5. five dogs
6. seven sheets of paper
7. three times
8. twenty tickets
9. 3 o’clock
10. 2:30

CULTURE: 왜 두 가지 숫자? (Why Two Number Systems?) Native Korean numbers are the original counting system. They predate writing and reflect how Koreans counted before Chinese influence arrived with Buddhism and Confucian scholarship around the 4th century. Sino-Korean numbers came with Chinese script and were adopted for formal, institutional, and mathematical contexts. Over centuries, the two systems settled into distinct roles rather than one replacing the other.

Today the divide is largely intuitive for native speakers, but for learners it requires deliberate practice. A useful way to think about it: Native Korean is the system you use when you’re in the physical world, counting tangible things and describing real time (hours, age). Sino-Korean is the system you use when you’re in institutional or abstract space: money, calendars, phone numbers, addresses. The overlap is small. When in doubt and something sounds wrong, it’s usually a system mismatch.

Homework

Before Lesson 17…

1. Write 하나 둘 셋 넷 다섯 여섯 일곱 여덟 아홉 열 from memory, then write the five short forms underneath: 한 두 세 네 (스무). These 15 items are the core of this lesson. If any letter is wrong, write the correct version 5 times.
2. Count real objects around you right now using the correct counter. Find three things you’d count with 개, one person to count with 명, and say what time it is in Korean using 시 and 분. Spoken out loud.
3. Add all 7 counters to your flashcard deck with a concrete example for each. The example is more important than the definition: it gives the counter context. Aim: see the counter, hear the category it applies to.
4. Practice the two-system time expression: pick five random times (e.g. 4:15, 7:45, 12:30, 9:05, 11:20) and say them in Korean. Remember: hours = Native, minutes = Sino. Getting 2:30 right as 두 시 삼십 분 is the test.
5. Lesson 17 preview: Days of the week, months, and calendar vocabulary. You’ll need your Sino-Korean numbers for months (삼월 = March) and your sense of the calendar to place vocabulary like 어제 (yesterday), 오늘 (today), 내일 (tomorrow), and 주말 (weekend). Very satisfying lesson: the language starts mapping onto real life.

Answer Key

Part 6 · Counting Practice:

1. 사과 한 개 (sa-gwa han gae): 하나 → 한 before 개
2. 커피 두 잔 (keo-pi du jan): 둘 → 두 before 잔
3. 세 명 (se myeong): 셋 → 세 before 명
4. 책 네 권 (chaek ne gwon): 넷 → 네 before 권
5. 강아지 다섯 마리 (gang-a-ji da-seot ma-ri): 다섯 stays as-is before 마리
6. 종이 일곱 장 (jong-i il-gop jang): 일곱 stays as-is before 장
7. 세 번 (se beon): 셋 → 세 before 번
8. 티켓 스무 개 (ti-ket seu-mu gae): 스물 → 스무 before 개
9. 세 시 (se si): Native Korean for hours · 셋 → 세 before 시
10. 두 시 삼십 분 (du si sam-sip bun): hours = Native (두) · minutes = Sino (삼십)