Learning Objective
Choose the correct Korean number system for common beginner situations.
Quick Summary
Korean uses native Korean numbers and Sino-Korean numbers. Learn each system together with its real use rather than memorizing two isolated lists.
Use this cheat sheet as a review tool after reading the main explanation. A cheat sheet should help you recall a pattern quickly, but it should not replace examples, pronunciation practice, or writing practice. Read each Korean form aloud, check the usage note, and then make one short sentence of your own before moving to the next item.
Core Information
| Korean | Romanization | Meaning | When to use | Example |
|---|---|---|---|---|
| 하나 · 한 | hana · han | one, native | counting items; 한 before a counter | 사과 한 개 |
| 둘 · 두 | dul · du | two, native | counting; 두 before a counter | 커피 두 잔 |
| 셋 · 세 | set · se | three, native | 셋 alone; 세 before a counter | 학생 세 명 |
| 일 · 이 · 삼 | il · i · sam | one · two · three, Sino-Korean | dates, money, phone numbers, minutes | 삼천 원 |
| 열 · 십 | yeol · sip | ten, native · Sino-Korean | choose by situation | 열 시 · 십 분 |
Visual Examples
사과 한 개
one, native · counting items; 한 before a counter
커피 두 잔
two, native · counting; 두 before a counter
학생 세 명
three, native · 셋 alone; 세 before a counter
삼천 원
one · two · three, Sino-Korean · dates, money, phone numbers, minutes
열 시 · 십 분
ten, native · Sino-Korean · choose by situation
Mini Dialogue
A
커피 몇 잔이에요?
How many cups of coffee?
B
두 잔이에요.
Two cups.
A
얼마예요?
How much is it?
B
육천 원이에요.
It is 6,000 won.
Grammar Connection
Native numbers commonly combine with counters such as 개, 명, 잔, and 시. Sino-Korean numbers combine with units such as 원, 분, 월, 일, and phone-number digits.
Pronunciation Tips
십육 is commonly pronounced 심뉵 because of sound changes. Learn frequent number combinations by listening to the complete unit.
Native Speaker Note
셋 means three when standing alone. Before a counter it changes to 세, as in 세 명. 하나, 둘, 셋, 넷 also become 한, 두, 세, 네 before many counters.
Native usage notes are included because beginners often learn a dictionary meaning first and later discover that the word or pattern is used more narrowly in real conversation. Pay attention to the situation, politeness level, and relationship described in the notes.
Common Mistakes
- Using 세 alone when 셋 is required
- Using native numbers for prices
- Reading hours and minutes with the same system
Memory Hacks
- Native numbers count people, items, and hours.
- Sino-Korean numbers handle money, dates, minutes, and phone digits.
- Remember the counter forms 한, 두, 세, 네.
Culture Note
Prices in Korea are often shown without a currency symbol in obvious contexts, but 원 is spoken or written when clarity is needed.
Quick Review Challenges
The review tasks below are short on purpose. A quick-reference page works best when it sends you back into active recall: covering the English, choosing a Korean form, saying a model sentence, and checking whether your choice matches the situation.
30 Second Review
Name one native-number use and one Sino-Korean use.
1 Minute Review
Read 3 people, 3,000 won, and 3 minutes in Korean.
5 Minute Challenge
Write your age, a price, a date, a time, and a phone-number sequence using the correct systems.
Self Check
Teacher Notes
- Teach number systems by situation, not only by sequence.
- Use counters with classroom objects and price labels for Sino-Korean practice.
- Level: beginner; suggested lesson use: 20 minutes.
Teachers can use the page as a warm-up, exit ticket, or review station. Ask learners to explain why one form fits a sentence instead of only copying the answer. This keeps the cheat sheet connected to understanding rather than passive memorization.
Extension Activity
Create a small cafe menu and role-play ordering different quantities, then calculate the total price in Korean.
Printable Version
Study the online explanation first. Then print this reference or choose Save as PDF in the print window for an offline copy.
Frequently Asked Questions
Why does Korean have two number systems?
The systems developed from native Korean vocabulary and Chinese-derived vocabulary. Modern usage assigns them to different situations.
Is 세 the Korean word for three?
세 is the shortened form used before many counters. 셋 is the standalone native Korean number three.