Korean Numbers Explained: Sino-Korean vs. Native Korean (1 to 100 and Beyond)

Most people learning Korean hit the same wall early on: they memorize the numbers 1–10, feel confident – and then discover there’s a completely different set of numbers they also need to learn. And that each set is used in different situations.

That’s not a coincidence or a flaw in the language. Korean has two number systems – Sino-Korean and Native Korean – and both are in active daily use. Knowing which one to use and when is one of the most practical things you can learn in Korean.

I’ve gone through this exact confusion myself when studying multiple languages systematically. The moment you understand the logic behind two parallel systems, it stops feeling overwhelming and starts making sense. This guide walks you through both systems clearly, with complete tables, pronunciation help, and practical usage rules.

The Two Korean Number Systems: What You Need to Know First

Korean developed two parallel counting systems over centuries. Native Korean numbers are the original system, used for everyday counting. Sino-Korean numbers arrived with Chinese cultural influence and became dominant for formal contexts, large quantities, and measurement. Today both systems coexist – and both are essential.

A quick comparison of 1–10 in both systems shows how different they look and sound:

Number	Sino-Korean (한자어)	Romanization	Native Korean (고유어)	Romanization
1	일	il	하나	hana
2	이	i	둘	dul
3	삼	sam	셋	set
4	사	sa	넷	net
5	오	o	다섯	daseot
6	육	yuk	여섯	yeoseot
7	칠	chil	일곱	ilgop
8	팔	pal	여덟	yeodeol
9	구	gu	아홉	ahop
10	십	sip	열	yeol

Two completely different sets of words for the same ten numbers. The good news: the logic behind each system is consistent, and once you understand the pattern, counting to 100 and beyond becomes straightforward.

Sino-Korean Numbers (일, 이, 삼) – 1 to 100 and Beyond

Sino-Korean numbers (한자어 숫자, hanjeo sutja) are derived from Chinese and follow a clean, logical base-10 pattern. Once you have 1–10, the rest builds on top of that foundation.

Sino-Korean Numbers 1–10

Number	Hangul	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

Sino-Korean 11–99: The Logic

From 11 onward, Sino-Korean numbers are built by combining tens and units. The structure is simple: [tens digit] + 십 (sip) + [units digit].

Examples: 11 = 십일 (sip-il), 20 = 이십 (i-sip), 35 = 삼십오 (sam-sip-o), 99 = 구십구 (gu-sip-gu). There are no irregular forms – it’s a clean, predictable system. This is one reason many learners find Sino-Korean easier to master first.

Sino-Korean Large Numbers: 100, 1,000, 10,000

This is where Korean diverges noticeably from European number systems. Korean has a dedicated unit for 10,000 – 만 (man) – rather than grouping numbers in thousands the way English does.

Value	Hangul	Romanization	Note
100	백	baek
1,000	천	cheon
10,000	만	man	Key unit – no direct English equivalent
100,000,000	억	eok	100 million

So 50,000 in Korean is 오만 (o-man), not “fifty thousand.” This trips up many learners when dealing with Korean prices, since even everyday items can cost tens of thousands of won. Once you internalize the 만 unit, reading prices becomes much more manageable.

When to use Sino-Korean numbers: dates (년/월/일 – year/month/day), money and prices, minutes (분), phone numbers, floor numbers in buildings, addresses, and any number above 99.

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Native Korean Numbers (하나, 둘, 셋) – Pure Korean Counting

Native Korean numbers – also called pure Korean numbers (고유어 숫자, goyueo sutja) – are the original Korean counting system. They feel less systematic than Sino-Korean at first, but they cover a specific and important set of daily contexts.

Native Korean Numbers 1–10 (하나, 둘, 셋…)

Number	Hangul	Romanization	Short form (before nouns)
1	하나	hana	한 (han)
2	둘	dul	두 (du)
3	셋	set	세 (se)
4	넷	net	네 (ne)
5	다섯	daseot	다섯 (daseot)
6	여섯	yeoseot	여섯 (yeoseot)
7	일곱	ilgop	일곱 (ilgop)
8	여덟	yeodeol	여덟 (yeodeol)
9	아홉	ahop	아홉 (ahop)
10	열	yeol	열 (yeol)

The Short Form: A Detail Most Guides Skip

Native Korean numbers 1–4 change their form when placed directly before a counting word (see the Korean counting units section below). Hana (하나) becomes han (한), dul (둘) becomes du (두), set (셋) becomes se (세), and net (넷) becomes ne (네). This happens automatically in natural speech – knowing it prevents one of the most common beginner errors.

Example: “one cup of coffee” is 커피 한 잔 (keopi han jan) – not 하나 잔.

Native Korean Numbers 11–99

Native Korean tens have their own unique words, which you need to memorize separately:

Value	Hangul	Romanization
10	열	yeol
20	스물	seumul
30	서른	seoreun
40	마흔	maheun
50	쉰	swin
60	예순	yesun
70	일흔	ilheun
80	여든	yeodeun
90	아흔	aheun

In-between numbers follow the pattern [tens] + [units]: 21 = 스물하나 (seumul-hana), 35 = 서른다섯 (seoreun-daseot), 47 = 마흔일곱 (maheun-ilgop). Native Korean only goes up to 99 in practical use – for 100 and above, Sino-Korean takes over.

When to use Native Korean numbers: telling the time (hours only), stating age in the traditional Korean system, counting objects with counters, ordering at a restaurant (“one beer” / “two tickets”), and counting in taekwondo.

Sino-Korean vs. Native Korean: When to Use Which System

This is the question that matters most in practice. From my experience studying several foreign languages, context-switching between two parallel systems is something you internalize through exposure – but having a clear reference makes that process much faster.

Context	System to Use	Example
Telling the time – hours	Native Korean	세 시 (se si) = 3 o’clock
Telling the time – minutes	Sino-Korean	삼십 분 (samsip bun) = 30 minutes
Age (traditional Korean)	Native Korean	스물다섯 살 = 25 years old
Dates (year, month, day)	Sino-Korean	오월 팔일 = May 8th
Money / prices	Sino-Korean	오천 원 = 5,000 won
Counting objects (with counter)	Native Korean	책 두 권 = 2 books
Phone numbers	Sino-Korean	010-이삼사오-육칠팔구
Floor numbers	Sino-Korean	삼 층 (sam cheung) = 3rd floor
Taekwondo counting	Native Korean	하나, 둘, 셋…
Numbers above 99	Sino-Korean	백, 천, 만…

The practical takeaway: if you’re dealing with time, age, or counting physical objects – use Native Korean. For everything involving formal numbers, money, dates, and large quantities – use Sino-Korean. This rule covers the vast majority of everyday situations.

Korean Numbers 1 to 100 – Complete Reference Tables

Both systems side by side, 1 to 100. Use this as a reference while you’re building your vocabulary.

Sino-Korean Numbers 1–100

#	Hangul	Romanization	#	Hangul	Romanization
1	일	il	11	십일	sibil
2	이	i	12	십이	sibi
3	삼	sam	13	십삼	sipsam
4	사	sa	14	십사	sipsa
5	오	o	15	십오	sibo
6	육	yuk	16	십육	simnyuk
7	칠	chil	17	십칠	sipchil
8	팔	pal	18	십팔	sippal
9	구	gu	19	십구	sipgu
10	십	sip	20	이십	isip
21	이십일	isibil	30	삼십	samsip
40	사십	sasip	50	오십	osip
60	육십	yuksip	70	칠십	chilsip
80	팔십	palsip	90	구십	gusip
100		백 (baek)

Native Korean Numbers 1–99

#	Hangul	Romanization	#	Hangul	Romanization
1	하나	hana	11	열하나	yeolhana
2	둘	dul	12	열둘	yeoldul
3	셋	set	13	열셋	yeolset
4	넷	net	20	스물	seumul
5	다섯	daseot	21	스물하나	seumulhana
6	여섯	yeoseot	30	서른	seoreun
7	일곱	ilgop	40	마흔	maheun
8	여덟	yeodeol	50	쉰	swin
9	아홉	ahop	60	예순	yesun
10	열	yeol	99	아흔아홉	aheun-ahop

How to Pronounce Korean Numbers

Korean pronunciation is more consistent than English – once you learn the rules, they apply across the board. A few points worth knowing specifically for numbers:

육 (yuk / 6) – When 육 appears at the start of a word or after certain consonants, it can sound closer to “nyuk.” You’ll notice this in 육십 (60), which is often pronounced “yuksip” but can vary slightly in fast speech.

십 (sip / 10) – In compounds, the final consonant of 십 often assimilates with the following syllable. 십육 (16) is pronounced “simnyuk,” not “sipnyuk.”

스물 (seumul / 20) – Before a counter or noun, this becomes 스무 (seumu). So “twenty people” is 스무 명 (seumu myeong), not 스물 명.

For deeper pronunciation practice, the Korean language overview on Britannica provides a solid phonological foundation. For systematic vocabulary building that reinforces what you’re learning here, the structured approach at our full Korean learning guide covers courses, methods, and vocabulary strategy in detail.

Korean Counting Units (수량사) – Why Numbers Alone Aren’t Enough

In Korean, when you count objects, you don’t just say the number. You add a counter word (수량사, suryangsа) that classifies what you’re counting. This is similar to saying “two cups of coffee” rather than just “two coffee” – except in Korean, the counter is mandatory.

The number used before a counter is always Native Korean (with the short form for 1–4). Here are the most important counters to know:

Counter	Hangul	Used for	Example
개 (gae)	개	General objects	사과 두 개 = 2 apples
명 (myeong)	명	People (formal)	세 명 = 3 people
권 (gwon)	권	Books, volumes	책 한 권 = 1 book
잔 (jan)	잔	Cups, glasses	커피 두 잔 = 2 coffees
살 (sal)	살	Age (years)	스물다섯 살 = 25 years old
번 (beon)	번	Times, instances	한 번 = once
장 (jang)	장	Flat objects, tickets	티켓 두 장 = 2 tickets
마리 (mari)	마리	Animals	고양이 세 마리 = 3 cats

The word order is: [noun] + [native number (short form)] + [counter]. Once this pattern clicks, it becomes second nature quickly. It’s one of the things that makes Korean feel more logical the longer you study it.

Lucky and Unlucky Numbers in Korean Culture

Numbers carry cultural weight in Korea, and knowing the basics helps you understand everyday context – from why some buildings skip floor 4 to why the number 8 appears in business names.

4 (사, sa) – The unlucky number. The word 사 sounds identical to the Chinese-derived word for death (死). This is why many Korean buildings label the 4th floor as “F” instead of 4, and why the number is sometimes avoided in gift-giving and formal contexts. Similar superstitions exist in Japan and China for the same linguistic reason.

8 (팔, pal) – Associated with prosperity. Influenced by Chinese cultural associations where 8 is considered lucky, the number appears frequently in business names and pricing in Korea.

7 (칠, chil) – Generally positive. Considered lucky, with Western cultural influence reinforcing this perception.

These aren’t rigid rules, but they show up in real contexts – addresses, pricing, floor plans – and it’s useful context when you’re building your everyday Korean vocabulary.

FAQ – Korean Numbers

What is the difference between Sino-Korean and Native Korean numbers?

Sino-Korean numbers (일, 이, 삼) derive from Chinese and follow a clean base-10 pattern. They’re used for dates, money, minutes, and large numbers. Native Korean numbers (하나, 둘, 셋) are the original Korean system, used for counting objects, telling hours, and stating age. Both are essential in everyday Korean.

When do you use Native vs. Sino-Korean numbers?

Use Native Korean for hours (telling time), age, and counting objects with counters. Use Sino-Korean for minutes, dates, money, phone numbers, floor numbers, and any number above 99. When in doubt about money or dates, it’s almost always Sino-Korean.

How do you count to 10 in Korean?

In Native Korean: 하나 (hana), 둘 (dul), 셋 (set), 넷 (net), 다섯 (daseot), 여섯 (yeoseot), 일곱 (ilgop), 여덟 (yeodeol), 아홉 (ahop), 열 (yeol). In Sino-Korean: 일 (il), 이 (i), 삼 (sam), 사 (sa), 오 (o), 육 (yuk), 칠 (chil), 팔 (pal), 구 (gu), 십 (sip).

Why does Korean have two number systems?

Native Korean numbers are the original counting system. Sino-Korean numbers arrived through Chinese cultural and linguistic influence over centuries and became dominant for formal, administrative, and mathematical contexts. Over time, the two systems settled into distinct functional roles rather than one replacing the other.

How do you say the number 4 in Korean?

In Sino-Korean: 사 (sa). In Native Korean: 넷 (net), or 네 (ne) before a counter. The Sino-Korean form 사 is avoided in some contexts because it sounds identical to the word for death.

How do you count Korean age?

Traditional Korean age is stated using Native Korean numbers followed by the counter 살 (sal). For example, 25 years old = 스물다섯 살 (seumul-daseot sal). Note that Korea officially transitioned to the international age system in 2023, so Sino-Korean age expressions (이십오 세) are now used in formal and legal contexts.

Do Korean numbers have a 1–1000 extension?

Yes – Sino-Korean numbers extend cleanly: 백 (100), 천 (1,000), 만 (10,000), 십만 (100,000), 백만 (1,000,000). The key difference from English is the unit 만 (10,000), which groups numbers in units of 10,000 rather than 1,000.

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