Korean numbers: native vs sino (guide on when to use each) | learn korean

Korean numbers: why are there two systems?

If you are just starting your journey into the korean language, Korean numbers can feel like a little trap.

You study hard, then suddenly you see 하나 (hana) and 일 (il) both meaning “one.”

You might think:

“Why are there two? Which one do I use, and when?”

If you feel this way, you are not alone. Many people using language learning blogs and apps get stuck right here.

Let’s walk through this together in a calm, simple way. By the end, you will know exactly which system to use in real-life situations like:

• Saying your age
• Telling the time
• Talking about money and prices
• Giving your phone number
• Talking about dates and months

You have got this.

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1. The two number systems in Korean

Korean uses:

1. Native Korean numbers
2. Sino-Korean numbers (numbers that originally came from Chinese)

Think of it like this:

• Native numbers = “Korean style”
• Sino-Korean numbers = “Chinese-origin style”

You do not need to know the history in detail. What matters for speaking is this:

Different situations prefer one system or the other.

Here is a quick snapshot:

We will go deeper into each, but keep this table in mind.

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2. Native Korean numbers: when and how to use them

Native numbers are used for things that feel more “Korean daily life” and less official or mathematical.

2.1 Native numbers 1–10

Here are the most common native numbers:

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)
11. 스무
12. 서른
13. 마흔

In real speech, these often change a bit before counters:

• 하나 → 한
• 둘 → 두
• 셋 → 세
• 넷 → 네

You will see this all the time.

2.2 Native numbers with age

For everyday “I am X years old” with friends or people around your age, Koreans usually use native numbers.

• 스무 살이에요. – I am 20 years old.
• 열아홉 살이에요. – I am 19 years old.

Pattern:

[Native number] + 살

In more official situations (hospital forms, news, government, contracts), you might hear Sino-Korean numbers for age, but as a learner it is safe to start with native.

2.3 Native numbers with counters and items

When you count physical things, you usually use native numbers with counters.

Common counters:

• 개 – general things
• 명 / 사람 – people
• 잔 – cups of drinks
• 마리 – animals
• 대 – machines (cars, phones, etc.)

Examples:

• 사과 두 개 주세요. – Please give me two apples.
• 커피 세 잔 주세요. – Three coffees please.
• 친구가 네 명 있어요. – I have four friends.

Try to focus on combining korean words for numbers with counters. That is much more useful than memorizing numbers alone.

2.4 Native numbers with hours (time)

For telling the hour on a clock, use native numbers.

• 한 시 – 1 o’clock
• 두 시 – 2 o’clock
• 세 시 – 3 o’clock
• 네 시 반 – 4:30 (literally “4 o’clock half”)

Minutes use Sino-Korean numbers. So you mix the two systems:

• 세 시 십오 분 – 3:15
• 다섯 시 삼십 분 – 5:30

We will look closely at Sino numbers next.

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3. Sino-Korean numbers: when and how to use them

Sino-Korean numbers are used for more “official” or structured things: money, dates, phone numbers, and so on.

Here are Sino-Korean 1–10:

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)

Then 20 is 이십 (i-sip), 30 is 삼십 (sam-sip), and so on.

3.1 Sino numbers for dates

For dates you will use Sino-Korean numbers almost everywhere:

• Year: [Sino number] + 년
• Month: [Sino number] + 월
• Day: [Sino number] + 일

Examples:

• 2024년 3월 1일 – March 1, 2024
• 1999년 7월 5일 – July 5, 1999

So if your birthday is April 24, you might say:

• 제 생일은 4월 24일이에요. – My birthday is April 24.

3.2 Sino numbers for money and prices

Money is all Sino-Korean:

• 1,000원 – 천 원 (cheo-n won)
• 10,000원 – 만 원 (man won)
• 15,000원 – 만 오천 원 (man o-cheon won)

Example in a shop:

A: 이거 얼마예요? – How much is this?

B: 만이천 원이에요. – It is 12,000 won.

3.3 Sino numbers for minutes and time

Remember: hours = native, minutes = Sino.

• 일 분 – 1 minute
• 십 분 – 10 minutes
• 이십 분 – 20 minutes
• 삼십 분 – 30 minutes

Together:

• 아홉 시 오 분 – 9:05
• 열한 시 이십 분 – 11:20

3.4 Sino numbers for phone numbers, rooms, buses, floors

Whenever you read out numbers one by one, it is almost always Sino-Korean.

Phone number:

010-728-6958

공일공 – 칠이팔 – 육구오팔

Bus, floor, room:

• 701번 버스 – bus 701
• 3층 – 3rd floor
• 210호 – room 210

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4. Easy rule of thumb: native vs Sino

Here is a simple way to decide which numbers to use:

Use native numbers for:

• Age in normal conversation
• Counting people and things with counters
• Hours in telling the time
• Small amounts in casual speech (sometimes)

Use Sino-Korean numbers for:

• Phone numbers
• Dates (year, month, day)
• Money and prices
• Minutes and seconds
• Floors, bus numbers, room numbers
• Math, scores, and other “number-heavy” situations

If you are unsure, ask yourself:

“Am I reading or writing a ‘label-like’ number (phone, price, date, math)?”

If yes, Sino-Korean is usually the answer.

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5. Real-life examples using both systems

Let us put this into real conversations so you can feel how it works.

5.1 At a café

A: 몇 분이세요? – How many people?

B: 두 명이에요. – Two people. (Native)

A: 음료는 몇 잔 필요하세요? – How many drinks do you need?

B: 아이스 아메리카노 두 잔, 라떼 한 잔 주세요. – Two iced Americanos, one latte please. (Native)

Here you are counting people and cups, so native numbers are used.

5.2 Talking about age

A: 몇 살이에요? – How old are you?

B: 스물네 살이에요. – I am 24 years old. (Native)

With friends, native numbers feel natural and friendly.

5.3 Making a plan and talking about time

A: 내일 몇 시에 만날까요? – What time shall we meet tomorrow?

B: 세 시 삼십 분에 만나요. – Let us meet at 3:30. (Native hour, Sino minutes)

You can also say 세 시 반 for 3:30, which is very common.

5.4 Shopping and money

A: 이 옷은 얼마예요? – How much are these clothes?

B: 사만 구천 원이에요. – It is 49,000 won. (Sino)

Money is always Sino numbers.

5.5 Sharing your phone number

A: 전화번호가 어떻게 돼요? – What is your phone number?

B: 공일공 – 오사구 – 칠팔삼이예요. – It is 010-549-7832. (Sino)

Here you read each digit with Sino-Korean.

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6. Study tips to master both systems

If this still feels a bit confusing, that is completely normal. You are learning a whole new way of thinking about numbers.

Here are some gentle, practical tips.

6.1 Connect numbers to real situations

Instead of memorizing lists, connect numbers to korean phrases you would actually say:

• Ordering: 사과 두 개 주세요.
• Time: 세 시 십 분이에요.
• Age: 스무 살이에요.
• Dates: 5월 10일에 만나요.

This helps your brain store numbers as part of useful korean vocabulary, not just isolated words.

6.2 Build from the basics: alphabet and pronunciation

If you already know the korean alphabet, reading numbers becomes much easier. You will be able to see the pattern between spelling and sound, and that makes it easier to remember.

When you learn korean app features that focus on speaking and listening, try to say the numbers out loud each time, not just read them silently. This trains your ear and your mouth together.

6.3 Use apps and tools in a smart way

Maybe you have tried different language learning applications or a simple language study app before. Many free language learning apps give you flashcards and multiple choice questions. These are helpful, but they often do not show you how numbers sound in real-life conversations.

That is why speaking-focused tools are powerful for learning korean for beginners. They let you hear and repeat natural dialogues with numbers, time, dates, and prices inside real situations.

Inside the Teuida, for example, you can listen to short stories and dialogues in Korean, answer like a real person, and practice numbers while ordering food, booking tickets, or meeting new people.

Many learners say this feels like the best way to learn korean because it is closer to daily life and less like a test.

6.4 How Teuida can help with numbers

If you have not tried it yet, you can look for the teuida app in your app store. The teuida korean app focuses on real conversations, not just grammar drills, which is perfect for mastering numbers naturally.

Search for teuida korean to see speaking missions that include time, prices, and dates. There is a teuida free version so you can test it, and if you enjoy it, you can upgrade to teuida premium later. You do not have to choose the best app to learn korean right away. Try, see how it feels, and go at your own pace.

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7. Putting it all together

Let us summarise the key idea:

• Use native numbers for age with friends, counting people and objects, and for hours.
• Use Sino-Korean numbers for dates, money, phone numbers, minutes, floors, and official-looking numbers.

If you keep meeting numbers in short, real conversations and practice saying them out loud, you will quickly become more comfortable. Step by step, you will learn to speak korean more naturally and confidently.

You are doing great so far. Take your time, revisit the examples, and maybe review this page again after a day or two. Your brain needs a little rest to store all this new information.