Native Korean numbers and counters

01 / Understand

Learn the native number series as usable words

The native Korean numbers from one to ten are 하나, 둘, 셋, 넷, 다섯, 여섯, 일곱, 여덟, 아홉, and 열. These are the forms you can learn in a counting sequence. They are a different series from 일, 이, 삼 and the other Sino Korean numbers. Their use depends on the expression, so learning them does not replace the Sino Korean system used for prices and minutes.

In a first lesson, connect the words with small groups of real objects. Look at three pencils, retrieve 셋, and then learn the complete counter expression needed to mention them in a sentence. A counting word by itself and a number before a counter can have different forms. Recognizing that distinction early prevents an apparently memorized number list from producing unnatural combinations in your first requests.

Pay attention to final consonants when reading aloud. 여덟 has a written final cluster, but in its isolated pronunciation the final sound is the liquid represented by l in the guide yeodeol. The Hangul spelling remains 여덟. 다섯 and 여섯 also have final consonants that do not sound like an English s at the end of an isolated word. Read the Hangul alongside the guide, and use recordings for the exact sound when available. Romanization helps identify a word; it does not fully describe Korean pronunciation.

02 / Understand

Change the five forms that come before counters

A counter is a word that identifies the unit being counted. 개 is a useful counter for many individual items. Before this counter, 하나 becomes 한, 둘 becomes 두, 셋 becomes 세, and 넷 becomes 네. The resulting phrases are 한 개, 두 개, 세 개, and 네 개. Keep a space between the number and the counter in these Hangul expressions.

Twenty also has a special form before a counter: 스물 becomes 스무. Thus twenty items is 스무 개. The changes are established forms, not a general instruction to delete the last consonant of every number. 다섯 개 and 여섯 개 retain their number spellings. If you shorten them by analogy with 둘, the result will not be the standard expression you are trying to produce.

The unit helps determine which form you need. If you are simply counting aloud, 하나, 둘, 셋 is a useful sequence. If you are requesting one item, 한 개 belongs before the request predicate. You may also hear a full number used without an explicit counter in an appropriate order, such as 하나 주세요 for one, please. That does not make 하나 개 the standard counter phrase. Distinguish an omitted counter from the wrong form directly before a stated counter.

03 / Understand

Build compound numbers without losing their forms

열 means ten. Add a ones number to form eleven through nineteen: 열하나 is eleven, 열둘 is twelve, and 열다섯 is fifteen. Before a counter, the final ones element takes the form needed in that position. Eleven items is 열한 개, and twelve items is 열두 개. The whole phrase follows the same number plus counter relationship as 한 개 and 두 개.

The native tens include 스물 for twenty, 서른 for thirty, 마흔 for forty, 쉰 for fifty, 예순 for sixty, 일흔 for seventy, 여든 for eighty, and 아흔 for ninety. These are vocabulary words to learn, rather than combinations built by putting 둘 or 셋 before 열. Thirty two is 서른둘 when counting, and 서른두 개 before the item counter. You can expand your active range gradually without postponing useful small quantities.

Twenty one illustrates an important boundary. The counting form is 스물하나, and twenty one items is 스물한 개. The special 스무 form is used for twenty directly before the counter, as in 스무 개; it does not replace the 스물 part inside twenty one. The ordinary native series extends through ninety nine, and quantities of a hundred or more use Sino Korean numbers. 백 개 therefore means one hundred items even though small counts with 개 usually use native forms.

04 / Understand

Match the counter to the thing being counted

A counter tells the listener what kind of unit your number counts. For a first set, use 개 for many separate items, 명 for people, 마리 for animals, 권 for books or volumes being counted, 잔 for cups of a drink, and 병 for bottles. These words help express the difference between two people, two books, and two bottles even though the number is the same.

A useful beginner order is noun, number, counter. 사과 두 개 identifies two apples, 책 세 권 identifies three books, and 커피 네 잔 identifies four cups of coffee. The counter phrase follows the noun it counts. English often places the number before the noun, so consciously rebuild the expression instead of copying the English word order one word at a time.

The general item counter is useful, but it is not the best choice for every noun. Use 명 for the people in your practice group and 마리 for animals rather than treating them as ordinary items with 개. The counter can also clarify the unit of a drink: 물 두 병 counts two bottles of water, while 물 두 잔 counts two cups. Learn a counter with a concrete noun and a sample quantity. That pairing makes it easier to retrieve the right unit when you need to order or describe something.

The same written unit can participate in a different number expression. 세 권 counts three books or volumes, whereas 삼 권 can label volume three in a series. The first tells you how many volumes there are; the second identifies which numbered volume you mean. Specify the situation when practicing so the intended number system is clear.

05 / Understand

Keep the count inside a complete message

A number and counter do not replace the need to express the sentence's meaning. 책 세 권이 있어요 says that there are three books, or that someone has three books in a suitable context. The subject particle 이 follows the consonant ending counter 권. The complete counted phrase functions as the thing that exists in this construction.

With an action such as reading, the counted books can be the object. 책 세 권을 읽어요 says that the understood person reads three books. The object particle 을 follows 권. The quantity stays the same, but the particle and predicate express a different relationship. Do not add a subject marker simply because the phrase contains a number. Decide what the counted things do in the sentence.

You will also encounter particles attached to the noun before the number phrase, as in 책이 세 권 있어요, as well as expressions with an omitted particle. These patterns are common and should not be rejected just because they differ from the one model used in a focused exercise. Here, practice the complete noun, number, counter, particle sequence when the prompt requests it. It makes the phrase boundary visible and lets you check the role of the whole group before exploring other natural arrangements.

06 / Understand

Use native forms for ordinary clock hours

The ordinary twelve hour clock pattern uses native numbers before 시. One o'clock is 한 시, two is 두 시, three is 세 시, and four is 네 시. The shortened forms are the same ones you learned before other counters. Five o'clock is 다섯 시, while eleven and twelve are 열한 시 and 열두 시. These examples make the number form rule useful for arranging a meeting.

Minutes use Sino Korean numbers with 분. Three twenty is 세 시 이십 분. It is normal to combine the native hour with the Sino Korean minute value in a single time expression. A learner who uses 세 for both units has recognized the quantity but missed the convention attached to the unit. Say each number together with its counter while practicing.

Keep clock time distinct from a duration measured in hours. 시 identifies the hour on a clock, while 시간 can measure an amount of time. 두 시 is two o'clock, and 두 시간 is two hours. If you say that an activity happens at two, 두 시에 gives its clock time. If you say it lasts two hours, the duration expression is 두 시간. The number form is the same, but choosing the wrong unit changes the message your listener receives.

07 / Understand

Ask for a quantity and make a request

몇 before a counter asks how many in an information question. 사과가 몇 개 있어요? asks how many apples there are, while 학생이 몇 명 있어요? asks how many students there are. The question retains the relevant counter so the listener knows what unit to supply. An answer can replace 몇 with the appropriate number form, such as 두 개 or 세 명.

For a simple request, noun plus number plus counter followed by 주세요 is useful. 사과 두 개 주세요 means two apples, please. The understood object particle can be omitted in this familiar request pattern; 사과 두 개를 주세요 is also possible. Use the quantity you actually want and a suitable counter. A sentence can have a polite ending and still be unclear if its unit is wrong.

Before opening the questions, prepare two messages from memory: request a small quantity, then state how many books are present. Check the number system, the special form before the counter, the unit, and the sentence role in that order. Change just one detail and produce the message again. For example, changing two books to four books tests the number form while preserving the counter and construction. Later, mix a book count with a clock time so that choosing the appropriate unit remains an active decision.

Notice the difference

Common mistakes

From understanding to using

Make your own example.

Try these without answer choices. Say your answer aloud or write it below, then compare your reasoning with the model.