Korean Numbers Explained: Native vs Sino-Korean Numbers
Korean Numbers Explained: Native vs Sino-Korean Numbers
If you are learning Korean, you may have already noticed something confusing.
Korean does not have just one number system.
It has two.
When I teach Korean numbers to beginners, this is one of the first topics that confuses almost everyone.
Students often ask me:
“Professor, why do Koreans have two different ways to say one, two, and three?”
The answer is simple.
Korean uses two number systems for different situations:
- Native Korean numbers
- Sino-Korean numbers
At first, this may sound difficult. But once you understand when each system is used, Korean numbers become much easier.
What Are Native Korean Numbers?
Native Korean numbers are the original Korean counting system.
They are usually used when counting people, animals, objects, and age. They are also used for hours when telling time.
For example:
- one person
- two apples
- three books
- four cats
- five years old
- three o’clock
| Number | Native Korean | Romanization |
|---|---|---|
| 1 | 하나 | hana |
| 2 | 둘 | dul |
| 3 | 셋 | set |
| 4 | 넷 | net |
| 5 | 다섯 | daseot |
| 6 | 여섯 | yeoseot |
| 7 | 일곱 | ilgop |
| 8 | 여덟 | yeodeol |
| 9 | 아홉 | ahop |
| 10 | 열 | yeol |
What Are Sino-Korean Numbers?
Sino-Korean numbers come from Chinese characters.
They are used for many formal, numerical, and measurement-related situations.
You usually use Sino-Korean numbers for:
- dates
- months
- minutes
- seconds
- money
- phone numbers
- addresses
- floor numbers
- math
| Number | Sino-Korean | Romanization |
|---|---|---|
| 1 | 일 | il |
| 2 | 이 | i |
| 3 | 삼 | sam |
| 4 | 사 | sa |
| 5 | 오 | o |
| 6 | 육 | yuk |
| 7 | 칠 | chil |
| 8 | 팔 | pal |
| 9 | 구 | gu |
| 10 | 십 | sip |
Native Korean vs Sino-Korean Numbers
The easiest way to understand the difference is this:
Native Korean numbers are often used for counting real-life things.
Sino-Korean numbers are often used for dates, money, phone numbers, and exact numerical information.
| Situation | Number System |
|---|---|
| Age | Native Korean |
| People | Native Korean |
| Animals | Native Korean |
| Objects | Native Korean |
| Hours | Native Korean |
| Dates | Sino-Korean |
| Months | Sino-Korean |
| Money | Sino-Korean |
| Phone Numbers | Sino-Korean |
| Addresses | Sino-Korean |
| Minutes and Seconds | Sino-Korean |
| Math | Sino-Korean |
Native Korean Numbers Change Before Counters
One important thing beginners should know is that some Native Korean numbers change before counters.
For example, 하나, 둘, 셋, 넷 become:
- 하나 → 한
- 둘 → 두
- 셋 → 세
- 넷 → 네
This is why Koreans say:
- 한 명 = one person
- 두 명 = two people
- 세 개 = three things
- 네 마리 = four animals
They do not usually say 하나 명 or 둘 명.
This is one of the most common beginner mistakes.
Examples with Native Korean Numbers
Native Korean numbers are very common in daily life.
Here are some useful examples:
- 한 명 = one person
- 두 명 = two people
- 세 권 = three books
- 네 마리 = four animals
- 다섯 개 = five things
- 열 살 = ten years old
If you are counting people, animals, objects, or age, Native Korean numbers are usually the right choice.
Examples with Sino-Korean Numbers
Sino-Korean numbers are also very common.
You will hear them in numbers that feel more official or exact.
- 일월 = January
- 삼월 = March
- 오천 원 = 5,000 won
- 십 분 = 10 minutes
- 삼십 초 = 30 seconds
- 일 층 = first floor
- 이 층 = second floor
Sino-Korean numbers are especially important for money, time, dates, and phone numbers.
How Korean Uses Both Systems in Time
Time is one of the best examples of how Korean uses both number systems together.
For hours, Koreans use Native Korean numbers.
For minutes, Koreans use Sino-Korean numbers.
For example:
- 한 시 = 1 o’clock
- 두 시 = 2 o’clock
- 세 시 = 3 o’clock
- 십 분 = 10 minutes
- 삼십 분 = 30 minutes
So 3:30 is:
세 시 삼십 분
This means:
three o’clock thirty minutes
At first this feels strange, but it becomes natural with practice.
Common Beginner Mistakes
Here are some common mistakes Korean learners make.
❌ 일 시
✅ 한 시
Use Native Korean numbers for hours.
❌ 둘 월
✅ 이월
Use Sino-Korean numbers for months.
❌ 삼 명
✅ 세 명
Use Native Korean numbers when counting people.
❌ 하나 개
✅ 한 개
Some Native Korean numbers change before counters.
Quick Memory Trick
If you feel confused, remember this simple rule:
Native Korean = counting everyday things
Sino-Korean = dates, money, phone numbers, and exact numbers
This rule will not explain every single case, but it will help you in most beginner situations.
Which Numbers Should Beginners Learn First?
If you are a beginner, do not try to master every possible number expression at once.
Start with these:
- Native Korean numbers 1 to 10
- Sino-Korean numbers 1 to 10
- How to count people
- How to say age
- How to say money
- How to tell time
This will cover many daily Korean situations.
Frequently Asked Questions
Why does Korean have two number systems?
Korean has Native Korean numbers and Sino-Korean numbers because of historical language development. Today, each system is used in different situations.
Which Korean number system should I learn first?
You should learn both systems early, but start with numbers 1 to 10 in each system. These are the most useful for beginners.
Do Koreans use Native Korean numbers for age?
Yes. Age is usually expressed with Native Korean numbers, especially in everyday speech.
Do Koreans use Sino-Korean numbers for money?
Yes. Korean money is usually expressed with Sino-Korean numbers.
Why is 3 o’clock 세 시, not 삼 시?
Korean uses Native Korean numbers for hours, so 3 o’clock is 세 시. Minutes use Sino-Korean numbers, such as 삼십 분 for 30 minutes.
Final Thoughts
Korean numbers may feel confusing at first because there are two systems.
But the logic becomes much clearer once you connect each system to real situations.
Use Native Korean numbers for counting people, objects, animals, age, and hours.
Use Sino-Korean numbers for dates, money, phone numbers, minutes, seconds, and formal numbers.
You do not have to master everything in one day.
Start with simple examples.
Practice them in real situations.
Little by little, Korean numbers will begin to feel natural.