Korean Numbers 1 to 100: Native and Sino-Korean

Why Korean has two number systems

Korean has two full sets of numbers, and this is the first thing to make peace with. There is the native Korean system, the original words that grew up with the language, and there is the Sino-Korean system, a set of number words that came from Chinese a very long time ago and became a permanent part of Korean. Both are used today by every Korean speaker, every day, without a second thought. As a learner, you have to build the same reflex, and it starts with understanding why two systems exist at all.

Think of it a little like English, which quietly does something similar. English has native words like "one, two, three" and it also has borrowed number-ish forms from Latin and Greek that show up in specific places: a "duo," a "trio," a "century," a "decade," "bi-" and "tri-" prefixes. English never made you choose one full system over another for counting, but the pattern of two vocabularies for numbers living side by side is not as strange as it sounds. Korean simply took it further and kept two complete systems in active use, each with its own job.

The good news is that the two systems do not overlap randomly. They split the work along fairly clear lines. Native Korean numbers handle counting real things, telling someone your age, saying how many people are in a group, and giving the hour when you tell time. Sino-Korean numbers handle dates, money, minutes, phone numbers, addresses, floors of a building, and most measurements. Once you learn the split, you are not really choosing between two options every time. The situation usually tells you which system to use.

There is one more piece of relief. You do not need native Korean numbers very high. In everyday modern Korean, native numbers get used up to about 99, and from 100 onward people switch to Sino-Korean numbers even for things they would normally count natively. That means the native system, which is the harder of the two to memorize, only asks you to learn about a dozen building blocks. Sino-Korean, the system you need for big figures like prices and years, is beautifully regular and easy to extend once you know 1 to 10. So the workload is smaller than "two whole systems" makes it sound.

If you are still getting comfortable reading the script these numbers are written in, it is worth a short detour first. Everything below is shown in Hangul as well as romanization, and being able to sound out the Hangul yourself will make it all stick far better. Our guide to the Korean alphabet, Hangul gets you reading syllable blocks quickly, and it pairs naturally with this page.

Native Korean numbers 1 to 10

Native Korean numbers 1 to 10 are hana, dul, set, net, daseot, yeoseot, ilgop, yeodeol, ahop, and yeol. These are the numbers you use to count objects, to give your age, and to say how many people are there. They are less regular than the Sino-Korean set, which means there is more raw memorization here, so it pays to drill these ten until they are automatic before you touch anything else.

A few notes will save you trouble. The romanized final sounds like the "t" in daseot, yeoseot, and set are soft, closer to an unreleased stop than a hard English "t," so they sound almost cut off. The "eo" in daseot, yeoseot, and yeodeol is a single Korean vowel, roughly the "u" in "up," not two separate sounds. And yeol, ten, ends in an "l" that is light and quick. None of this is hard, but reading the Hangul and saying each word aloud will teach your mouth these sounds far better than staring at the romanization, which is only ever an approximation.

Here is the catch that surprises people: five of these numbers change shape when you actually use them to count something. Hana becomes han, dul becomes du, set becomes se, net becomes ne, and later on seumul (twenty) becomes seumu. You will almost never say "hana" on its own when counting a noun. You say han gae for one item, du myeong for two people, se si for three o'clock. We will come back to counters in their own section, but plant the flag now: the dictionary form and the counting form are not always the same word, and the counting form is what you say most.

Sino-Korean numbers 1 to 10

Sino-Korean numbers 1 to 10 are il, i, sam, sa, o, yuk, chil, pal, gu, and sip. This is the system you use for dates, money, phone numbers, minutes, and any large figure. The wonderful thing about Sino-Korean is how regular it is. Once you know these ten words plus a handful of larger units, you can build essentially any number by stacking them in a completely predictable way, with none of the shape-changing that native numbers do.

Notice that zero has two words. 영 (yeong) is the general word for zero, used in math and measurements, while 공 (gong) is the one you say when reading digits out one by one, like in a phone number. Both are common, and which one you hear depends on the situation, so it is worth knowing both from the start.

Sino-Korean numbers also connect neatly to the words for larger units, which is what makes the system scale so easily. Ten is 십 (sip), a hundred is 백 (baek), a thousand is 천 (cheon), and ten thousand is 만 (man). That last one matters more than it looks, because Korean, like several East Asian languages, groups large numbers by ten thousands rather than by thousands. So where English thinks in thousands and millions, Korean thinks in man (ten thousand) and eok (a hundred million). You will not need those big units for numbers up to 100, but keep 백 baek in your back pocket, because it is the word you switch to for one hundred in both systems.

Counting to 100 in both systems

Now for the part that makes numbers actually usable: how to build every value from 11 up to 100. Both systems use the same core logic, which is "tens plus ones," but they differ in one key way. Sino-Korean builds its tens from the small numbers (twenty is literally "two-ten"), while native Korean has unique standalone words for each ten. Let us take them one at a time.

The Sino-Korean tens (the easy one)

Sino-Korean is almost mechanical, which is why learners love it. Twenty is 이십 (isip), literally "two ten." Thirty is 삼십 (samsip), "three ten." Fifty is 오십 (osip). To make any number in between, you just add the ones digit on the end. Twenty-one is 이십일 (isibil), "two ten one." Forty-seven is 사십칠 (sasipchil), "four ten seven." There are no exceptions to memorize. If you know 1 to 10 and you know the pattern, you know every Sino-Korean number to 99, and 100 is simply 백 (baek).

A worked example makes the pattern obvious. To say 68 in Sino-Korean, you take 60, which is 육십 (yuksip), and add 8, which is 팔 (pal), giving 육십팔 (yuksippal). To say 95, take 90, 구십 (gusip), plus 5, 오 (o), for 구십오 (gusibo). The romanization sometimes shifts a little as sounds blend across the boundary, which is a normal feature of spoken Korean, but the structure never changes. Tens first, then ones, every time.

The native Korean tens (the memorize-a-few one)

Native Korean asks a bit more of you, because each ten from 20 to 90 has its own dedicated word rather than being built from smaller pieces. These are the words you truly have to memorize: seumul, seoreun, maheun, swin, yesun, ilheun, yeodeun, aheun. Once you know them, you fill in the ones digit using the native 1 to 9 you already learned, just as you did with Sino-Korean.

To build a native number, combine the ten with the one. Twenty-three is 스물셋 (seumulset), thirty-five is 서른다섯 (seoreundaseot), forty-two is 마흔둘 (maheundul). Just remember the shape-changing rule from earlier: when a counter follows, seumul softens to seumu and the small numbers shorten, so twenty-one people is seumu han myeong, not seumul hana myeong. And notice the table stops being native at 100. There is no everyday native word for one hundred, so once you reach 100 you use baek from the Sino-Korean side, even when counting things you would otherwise count natively. That is the practical ceiling on the native system, and it is why you can get away with learning only about a dozen native building blocks.

When to use native Korean numbers

You use native Korean numbers for counting concrete things, for age, for the number of people, and for the hour when telling time. This is the system of the physical, countable, everyday world: apples on a table, people in a room, hours on a clock, how old you are. If you can point at what you are counting or you are stating an age, native numbers are almost always the right call.

Here are the main places native numbers do the work:

• Counting objects. Two coffees, three books, five tickets. Native numbers pair with a counter to count nearly any physical item. Han gae, du gae, se gae for one, two, and three things in the general case.
• Age (in casual speech). When you say how old someone is in ordinary conversation, you use native numbers with the counter sal. Seumul sal is twenty years old, seoreun sal is thirty. There is also a formal way to state age with Sino-Korean numbers, but the native version is what you hear day to day.
• Number of people. How many are coming, how many are in your party at a restaurant. Han myeong, du myeong, se myeong for one, two, three people.
• The hour when telling time. One o'clock, two o'clock, three o'clock all use native numbers with the counter si. Han si, du si, se si. The minutes, as we will see, flip to Sino-Korean.
• Counting general amounts of things you handle. Cups, bottles, animals, slices, pieces. Anything you would naturally count out loud as you point at it tends to take native numbers plus the right counter.

The tricky wrinkle, again, is that native numbers usually appear in their shortened counting form, not their dictionary form. You learned the words as hana, dul, set, net, but in real use before a counter they become han, du, se, ne, and twenty becomes seumu. So the version you memorized from a chart is not quite the version you say most of the time. This is the single most common stumble for beginners, and the fix is simply to practice the counting forms directly: say han gae, du myeong, se si aloud until the shortened forms feel more natural than the dictionary ones.

When to use Sino-Korean numbers

You use Sino-Korean numbers for dates, money, phone numbers, minutes, addresses, floor numbers, and most measurements. Where native numbers handle the countable physical world, Sino-Korean handles figures, labels, and anything you read off rather than count out. If you are quoting a price, reciting a phone number, giving a year, or stating a measurement, Sino-Korean is the system.

The main territory for Sino-Korean numbers:

• Money. Prices in won use Sino-Korean, always. Because prices climb into the thousands and tens of thousands, and because Korean groups by man (ten thousand), money is pure Sino-Korean territory.
• Dates. Years, months, and days all use Sino-Korean numbers. The month is the Sino number plus 월 (wol), and the day is the Sino number plus 일 (il). So March is sam wol, literally "three month," and the fifth day is o il.
• Minutes. When telling time, the minutes use Sino-Korean with the counter 분 (bun). Ten minutes is sip bun, thirty minutes is samsip bun. This is why the clock mixes systems.
• Phone numbers. Read digit by digit in Sino-Korean, often using gong for the zeros. Each number is just spoken in order, one digit at a time.
• Addresses, floors, and bus or line numbers. Building floors, apartment numbers, and the numbers of buses and subway lines are Sino-Korean.
• Measurements and math. Weights, distances, temperatures, and arithmetic all run on Sino-Korean numbers.

Here is a compact side-by-side to fix the split in your memory. When you are unsure which system a situation calls for, this is the table to picture.

A pattern you may notice: Sino-Korean tends to show up wherever numbers get large or wherever they are really labels rather than counts. That is a useful instinct to build. Big figures, formal figures, and read-out figures lean Sino. Small, tangible, countable things lean native. It is not a perfect rule, but it will steer you correctly far more often than not while the specific cases settle into memory.

Counters: gae, myeong, and sal

A counter is a small word you place after a number when you count something, and Korean, like many East Asian languages, uses them constantly. In English you can say "three dogs" directly. In Korean you generally cannot say a bare number plus a noun to count it. You say the equivalent of "dogs three animals," using a counter that matches the kind of thing you are counting. There are many counters, but a few carry most of the everyday load, and those are the ones to learn first.

If you learn just three counters to start, make them 개 (gae), 명 (myeong), and 살 (sal). 개 is the general-purpose counter for objects, and it is your safety net: when you do not know the specific counter for a thing, gae is very often acceptable or at least understood. 명 counts people. 살 states age. These three cover a huge share of the counting you will do as a beginner, and all three take native numbers, so you get to reuse the native counting forms you drilled earlier.

Now the rule that ties this section to everything above. When a native number sits in front of a counter, the shape-changing kicks in. So:

• One item is 한 개 (han gae), not hana gae.
• Two people is 두 명 (du myeong), not dul myeong.
• Three cups is 세 잔 (se jan), not set jan.
• Four animals is 네 마리 (ne mari), not net mari.
• Twenty years old is 스무 살 (seumu sal), not seumul sal.

Everything else keeps its normal form: daseot gae for five items, yeoseot myeong for six people, and so on. Only hana, dul, set, net, and seumul shorten. Because these five are among the most common numbers you will ever say, the shortened forms are worth burning in early. Say "han gae, du gae, se gae, ne gae, daseot gae" as a chant. The rhythm helps it stick, and it puts the awkward shape-changing exactly where you need it, in front of a counter, which is where it always happens.

One more practical note. Age with 살 uses native numbers in casual speech, which means a very common sentence like "I am twenty-five years old" comes out as seumul daseot sal. But you will also meet a formal, respectful way to ask and state age using Sino-Korean and a different word, which older speakers and formal settings prefer. Start with the native version, since it covers most conversations, and pick up the formal one as you meet it. If memorizing all these forms feels like a lot, our guide on how to memorize vocabulary so it sticks lays out techniques that work just as well for number words and counters as for regular words.

Telling time: where both systems meet

Telling time in Korean is the one place where both number systems appear in a single breath, and it is worth its own section because it confuses nearly everyone at first. The rule is short: the hour uses native Korean numbers with the counter 시 (si), and the minutes use Sino-Korean numbers with the counter 분 (bun). Two systems, one clock, back to back.

So three o'clock is 세 시 (se si), using native se, the shortened form of set, plus the hour counter. And fifteen minutes is 십오 분 (sibo bun), using Sino-Korean sibo for fifteen plus the minute counter. Put them together and 3:15 is 세 시 십오 분 (se si sibo bun). The first half is native, the second half is Sino. Once you hear it as two separate jobs, hour then minutes, the mix stops feeling random.

Look at the hour column and you will spot the counting forms doing their job: han si and du si and se si, not hana si or dul si or set si. Twelve o'clock is yeoldu si, where twelve, yeoldul, also drops its final sound before the counter to become yeoldu. The minute column, by contrast, is plain Sino-Korean with no shape-changing at all, which is one more reason the Sino system feels easier. The only real work here is training yourself to switch systems mid-sentence, and that only comes from saying whole times out loud, not from reading them.

A tip that helps: practice reading the actual clock in front of you throughout the day. Every time you check the time, say it to yourself in Korean, hour in native, minutes in Sino. You get a dozen free reps a day, in real context, and the awkward hand-off between the two systems becomes smooth within a week or two of doing it consistently.

Money, dates, and phone numbers

Money, dates, and phone numbers are three of the most useful real-world uses of Korean numbers, and all three run on Sino-Korean. If you are traveling, shopping, or setting up anything official, these are the number skills you will reach for first, so they are worth a focused pass.

Money

Korean currency is the won, written 원 in Hangul, and prices always use Sino-Korean numbers. Because everyday prices climb quickly, this is where the ten-thousand unit 만 (man) earns its keep. A thousand won is 천 원 (cheon won). Ten thousand won is 만 원 (man won). Fifty thousand won is 오만 원 (oman won), literally "five ten-thousand won." The habit to build is thinking in units of man once numbers get large, because that is how the language chunks them, and translating from English thousands in your head will slow you down.

Dates

Dates are Sino-Korean and follow a tidy pattern. The year is the Sino number plus 년 (nyeon), the month is the Sino number plus 월 (wol), and the day is the Sino number plus 일 (il). So the fifth of March reads as sam wol o il, "three month five day," and Korean states dates from largest unit to smallest, year then month then day. Two months have slightly irregular spellings you should simply memorize: June is 유월 (yuwol), not yuk wol, and October is 시월 (siwol), not sip wol. Every other month is perfectly regular, so those two are the only exceptions worth flagging.

Phone numbers

Phone numbers are read out digit by digit in Sino-Korean. There is no grouping into tens or hundreds. You simply say each number in order, and zeros are usually read as 공 (gong). So a number beginning 010 is spoken gong il gong. The hyphen between groups of digits is often marked by a short word meaning "of" or just a pause, but as a beginner you can read the digits straight through and be understood perfectly. Because this is pure Sino-Korean 0 through 9 with no combining, phone numbers are actually one of the easier speaking drills, and reciting a few real numbers aloud is a great way to lock in the Sino digits.

Notice how much of daily life these three cover: paying for things, making plans, exchanging contact details. Master money, dates, and phone numbers and you have covered most of the numbers a traveler or new resident needs, all from the single, regular Sino-Korean system. If you are building a broader plan for the language around skills like this, our full guide to learning Korean shows where numbers fit alongside pronunciation, vocabulary, and speaking.

How to practice Korean numbers out loud

Reading number tables is the easy part, and it is also the part that fools you. You look at a chart, everything makes sense, and you close the tab feeling like you learned Korean numbers. Then a cashier says a price at real speed, or someone asks your age, and nothing comes out. The gap between recognizing a number and producing it on demand is enormous, and numbers make it worse than most vocabulary because they arrive fast and there are no context clues to lean on. Closing that gap takes out-loud practice, in context, on purpose.

Here are the drills that actually move the needle:

• Say the clock all day. Every time you check the time, say it in Korean, native hour plus Sino minutes. It is free, frequent, and forces the system-switch that trips people up. A dozen reps a day adds up fast.
• Price things out loud. As you go through your day, put Sino-Korean prices on things: the coffee, the bus fare, the groceries. Say the won amount aloud. This drills big Sino numbers and the man unit in exactly the context you will need them.
• Count real objects. Count things around you with native numbers and a counter. Books on a shelf as se gwon, cups in the sink as du jan, people at the table as ne myeong. This burns in the shortened counting forms where they belong.
• Recite phone numbers. Read any phone number you see, digit by digit in Sino-Korean, using gong for zeros. Quick, easy, and it cements the digits.
• Give ages. Practice stating your age and the ages of people you know with native numbers plus sal. Seumul daseot sal, seoreun sal, and so on.

The thread through all of these is that you say the number, out loud, tied to a real situation. Silent recognition builds a fragile kind of knowledge that collapses the moment you need speed. Speaking builds the automatic recall that lets a number leave your mouth before you have consciously assembled it. If you want to go deeper on the mechanics of clear sounds while you drill, our guide on how to improve your pronunciation covers the habits that keep your numbers, and everything else, sounding natural.

The honest obstacle is the same one every speaking skill runs into: you need someone to practice with, and a patient partner who will let you fumble through prices and times at your own pace is not always sitting next to you. Reading tables alone will never produce fast, spoken numbers, which is why so many learners can recite a chart perfectly and still freeze at a register. This is exactly the gap an AI speaking partner is built to close.

Common mistakes with Korean numbers

Almost everyone learning Korean numbers makes the same handful of mistakes. Knowing them ahead of time will not make them vanish, but it shortens the time you spend stuck on each one. Here are the ones that cost learners the most, and how to get past them.

1. Using the wrong system. The classic error is saying a native number for a date or a Sino number for the hour. The fix is not memorizing a giant rulebook, it is drilling the common situations until the right system comes automatically. Prices, dates, and phone numbers are Sino; counting, age, people, and hours are native. Practice those categories, not abstract rules.
2. Forgetting the shape-changing forms. Saying hana gae instead of han gae, or seumul sal instead of seumu sal. This one is pure habit. Chant the counting forms, han gae du gae se gae, until the shortened versions feel more natural than the dictionary ones.
3. Mixing up the two zeros. Using yeong when you should read a phone-number digit as gong, or vice versa. It rarely breaks understanding, but knowing yeong is the general zero and gong is the read-out-loud digit will make you sound more natural.
4. Thinking in thousands instead of ten-thousands. When prices get big, learners try to translate English thousands directly and stall. Retrain yourself to chunk large numbers by man (ten thousand), because that is how Korean groups them, and the conversion in your head disappears.
5. Missing the two date exceptions. Saying yuk wol for June or sip wol for October instead of the correct yuwol and siwol. Just memorize these two. Every other month is regular.
6. Only ever reading, never speaking. The biggest one of all. Numbers arrive fast in real speech, and recognition built from silent reading falls apart under that speed. If you only practice by looking at tables, you will always be a beat too slow when it counts. Say them aloud.

See the common thread. Most of these mistakes are not about not knowing the numbers, they are about not having practiced them out loud in the situations where they appear. You can know every entry in every table on this page and still stumble in a real exchange, because knowing and saying are different skills. The mistakes shrink when your practice shifts from reading to speaking.

How SPAIKING helps you speak the numbers

Korean numbers are a perfect example of something you cannot learn from tables alone. The knowledge is simple enough to fit on a couple of charts, but the skill, saying the right number in the right system at conversational speed, only comes from producing them out loud, over and over, in real situations. That is the exact gap SPAIKING is built to close.

Here is how it fits into everything above. After you have studied the two systems here, you open SPAIKING and actually talk, with an AI partner that speaks back to you in real time. It can play the cashier who tells you a price you have to understand, ask how old you are so you produce the native number plus sal, or ask what time your plans are so you have to switch from native hour to Sino minutes on the fly. Because the AI responds live, you get the two-way pressure that a chart or a flashcard can never give you, the pressure that turns recognition into speech.

The parts that make it work for numbers specifically:

• It puts numbers in real context. Prices, times, ages, and counts come up inside actual conversation, which is the only place your brain learns to pick the right system without thinking.
• It corrects you in the moment. Say seumul sal when you meant seumu sal, or reach for the wrong system, and you find out right away, while it still matters, instead of practicing the mistake into a habit.
• It is always available. No scheduling a tutor, no waiting for a language exchange. You can drill numbers out loud for five minutes whenever you have them.
• It is judgment-free. You can fumble a price ten times and the AI just keeps the conversation moving, which is what finally gets nervous learners to speak instead of hiding in more tables.

Think of the tables on this page as the raw material and SPAIKING as the place you turn that material into an actual skill. You learn the systems here, then you go say them until they are fast, automatic, and correct. That is the whole path from recognizing a Korean number to being the person who says it without a pause. You can start on the pricing page and begin turning these charts into real spoken Korean.