How to Learn Korean Numbers: a Step-by-Step Order

Before you start

• Time: 14 days, 15 minutes a day, about 3.5 hours in total.
• Difficulty: beginner (A1). The hard part is keeping two number systems apart.
• You need: the ability to read Hangul, a notebook, and the linked lesson pages.
• Success factor: say every new number aloud, in a sentence, on the day you learn it.
• Checkpoints at the end: your phone number, the time, two coffees and your age.

How to Learn Korean Numbers

Korean has two number systems, and each is used for different jobs. Sino-Korean numbers (일, 이, 삼) come from Chinese and handle dates, money, phone numbers and minutes. Native Korean numbers (하나, 둘, 셋) are the older Korean series and handle counting objects, hours and ages. The two systems overlap in daily life, and learners who study them in the wrong order mix them up for months.

The order that works best is the one below. It follows how regular each system is and how soon you can use it in a real conversation.

1. 01

   Days 1-3: Sino-Korean 1-100

   Say any number to 100 and read a phone number

   45 minutes

   Korean Numbers 1-10Both systems side by side with audio.

   Sino-Korean Numbers 1-100The full list and the digit + 십 rule.

2. 02

   Days 4-6: Native 1-10 and 개

   Count objects and order three of something

   45 minutes

   Native Korean Numbers 1-10하나 to 열 and the short forms.

   The 개 CounterThe general counter for objects.

3. 03

   Days 7-9: Telling Time

   Tell the time on any clock

   45 minutes

   Telling the HourNative numbers with 시.

   Minutes and SecondsSino-Korean numbers with 분.

4. 04

   Days 10-12: Prices

   Read and say prices up to 99,000 won

   45 minutes

   Korean WonPrices from 천 원 to 만 원.

   The 원 CounterHow to say amounts of money.

5. 05

   Days 13-14: Age and Review

   State your age and pass all four checkpoints

   30 minutes

   The 살 CounterAges with native numbers.

   How to Say a Phone NumberDigits, zero and pauses.

Each daily session has the same shape. Spend 3 minutes reviewing yesterday, 8 minutes on the new numbers, and 4 minutes saying them in a short sentence. That structure is a form of retrieval practice: recalling numbers from memory strengthens them more than rereading a list. The first step is the largest, so it gets the most space.

Step 1: Learn Sino-Korean 1-10 and 20-100

Learn Sino-Korean 1-10 on Day 1, 11-99 on Day 2, and 100 plus phone digits on Day 3. Sino-Korean comes first because it is the most regular system: every number from 11 to 99 is built from the ten digits and the word 십 (ten). There are no new words to memorise after Day 1.

The rule for tens is "digit + 십 + digit". For 23, say the digit 이 (2), then 십 (ten), then 삼 (3). Notice that 10 is 십, not 일십, and 100 is 백, not 일백. Zero is 영 in counting and 공 in phone numbers. Practise Days 2 and 3 with the full list in Sino-Korean numbers 1-100. The sentences below use the pattern for the first time:

• 제 번호는 공일공 이삼사오 육칠팔구예요. "My number is 010 2345 6789."

You'll know it worked when you can say your own phone number twice without looking, and read 23, 47 and 86 on sight.

Common mistake at this step: reading 십 as 일십 or 백 as 일백. Korean drops the 일 before 십, 백, 천 and 만, so 10 is 십 and 100 is 백. The next step moves to a different system, and the first thing to remember is why you need it.

Step 2: Learn Native 1-10 with the 개 Counter

Learn native Korean 1-10 on Days 4 to 6, together with the counter 개 (a unit word for things). Native numbers need a counter to be useful, and 개 is the simplest. Native Korean numbers are the series 하나, 둘, 셋, and they shorten before a counter: 한, 두, 세, 네.

Spend Day 4 on 하나 to 다섯, Day 5 on 여섯 to 열, and Day 6 on the short forms and 몇 개. Learn the question 몇 개예요? ("how many?") on Day 6, because it is the question most used with native numbers. The counter itself is in the 개 counter, and the reason for two systems is in Sino vs native Korean numbers.

You'll know it worked when you can count ten objects on your desk aloud and ask for three of something without hesitating.

Common mistake at this step: memorising native numbers up to 99 before using 1-10 in sentences. In beginner situations, native numbers above 20 come up mainly for age. Learn them on Day 13, when you need them.

Pitfall box. Do not try to memorise native 1-100 first. Sino-Korean 1-100 is regular and useful immediately. Native 1-10 is irregular and useful mostly with counters. Spend your time where the return is highest.

The next step combines the two systems in a single sentence, and it is the most satisfying of the five.

Step 3: Combine Them to Tell Time

Learn to tell time on Days 7 to 9. A clock time uses both systems at once: native numbers for the hour and Sino-Korean numbers for the minutes. 세 시 십오 분 is "3:15", with 세 (native 3) before 시 (o'clock) and 십오 (Sino 15) before 분 (minutes).

Use Day 7 for the hours 한 시 to 열두 시 from telling the hour, Day 8 for the minutes in minutes and seconds, and Day 9 for the question 지금 몇 시예요? and the answer. Say the answer in full each time: 지금 세 시 십오 분이에요.

You'll know it worked when you can look at any analogue or digital clock and say the time in Korean in under five seconds.

Common mistake at this step: using Sino-Korean numbers for the hour (삼 시) or native numbers for the minutes (열다섯 분). In everyday clock time the hour is native and the minute is Sino-Korean. (Timetables that use the 24-hour clock read the hour in Sino-Korean, as in 십오 시, but you can learn that later.) After time comes the system most visitors meet first: money.

Step 4: Read Prices

Learn prices on Days 10 to 12. Prices use Sino-Korean numbers followed by 원 (won). The only new word is 만 (10,000), because Korean groups large numbers by ten-thousands, not thousands.

Work through 100 to 1,000 on Day 10 using Korean won, add 만 and the thousands on Day 11, and rehearse a shop dialogue on Day 12 using the 원 counter. The shop dialogue below is the pattern to rehearse:

The last line shows both systems in one exchange: 두 개 (native) for the quantity and 구천 원 (Sino-Korean) for the price.

You'll know it worked when you can read 4,500원 and 12,000원 aloud on sight and answer 얼마예요?.

Common mistake at this step: saying 일만 원 for 10,000 won. The 일 is dropped before 만, so say 만 원. The last step adds the two remaining jobs, age and phone numbers.

Step 5: Say Your Age and Phone Number

Use Days 13 and 14 for age and the final review. Ages use native numbers followed by 살: 스물다섯 살 (25 years old). Native numbers above ten are needed here, and this is the first time they are useful.

Learn the native tens (열, 스물, 서른, 마흔, 쉰) from the 살 counter on Day 13, and ask and answer 몇 살이에요?. Day 14 is a full review: say your phone number, tell the time, order two coffees and state your age. To order two coffees you need one more counter, 잔 (cup), which is in the 잔 counter: 커피 두 잔 주세요. The four checkpoints form a short spoken test.

You'll know it worked when you can pass all four checkpoints in a row without notes: your number, the time, two coffees and your age.

Common mistake at this step: using Sino-Korean numbers for a friendly age (이십오 살). Casual and polite speech uses native numbers with 살. The formal written form 이십오 세 uses Sino-Korean numbers with 세, which you will meet on forms.

What Mistakes Slow Learners Down?

Four mistakes cost the most time. Each is easy to avoid once you know it.

• Mixing the systems inside one phrase. 세 시 십오 분 is correct, but 삼 시 십오 분 and 세 시 열다섯 분 are not. Check each word: hour native, minute Sino.
• Learning every native number first. At this stage, native numbers beyond 10 matter mostly for age. Use Sino-Korean for dates, money, minutes and phone numbers.
• Reading but not speaking. Numbers are a spoken skill. Say each number aloud, and then say a sentence with it.
• Skipping counters. A number without a counter is half a phrase. Learn 개 on Day 6 and 잔 on Day 14, then add one new counter per week.

Learners often assume that the fastest route is a long chart of 1-100 in both systems. Actually a chart helps recognition, but speaking needs short, repeated tasks tied to a real use. That is why every step above ends with a checkpoint.

For extra drills, the site has a Korean numbers quiz with instant feedback, and Korean numbers flashcards for review and printing. A sample deck is below.

How Long Will It Take?

The plan takes 14 days, at 15 minutes a day, which is about 3.5 hours in total. Speed varies, so treat each figure here as a typical plan, not a promise. The ranges below show how the same route stretches.

Sino-Korean 1-100 is the quickest part for most learners, because it rests on ten words and one rule. Native numbers, time and ages need more repetition, since each has irregular forms. Add extra days to any step where you miss the checkpoint, and do not move on until you pass it. The plan covers the numbers, and one question comes up from exam-minded learners.

Are Numbers on TOPIK I?

Numbers appear throughout TOPIK I, but there is no separate numbers section. The test has listening and reading sections only, and numbers show up inside questions about prices, times, dates and quantities. Learning both systems well is therefore useful preparation. See TOPIK I for the exam itself.

Which Route Fits You If Time Is Short?

If you have less time, keep the order and shrink the content. The three variations below cover the most common situations.

For a one-week trip, spend two days on Sino-Korean 1-100 and prices, two on the hour and minute, and one on ordering with 개. For those who already know Sino-Korean 1-10, start at Day 2 and add one review day. In all cases the Korean numbers hub, Korean Numbers, has the full reference lists.

Where Does This Plan Stop?

This plan covers the numbers 1-100 in Sino-Korean, native 1-10 with the age tens, and four everyday uses. It does not cover large numbers beyond 만, ordinals such as 첫째, fractions, or the long list of counters. It also assumes you can read Hangul; if you cannot, start with Hangul first. The times shown are plan design figures, not measured results, and your own pace may differ.

What to Learn Next

After Day 14, deepen each step in turn: Sino-Korean 1-100 in Korean numbers 1-10 and its follow-ups, counters in the 개 counter, and the money system in Korean won. With the order above in hand, you now know how to learn Korean numbers in a way that lets you use them within two weeks.

Frequently Asked Questions

Can I learn Korean numbers in one day? You can learn Sino-Korean 1-10 in one day, and many learners do, but a single day is not enough to use both systems in sentences. A realistic target for one day is 일 to 십 plus the 20-100 pattern. Spread the rest over two weeks so that time, prices and counters can settle.

Should I learn Sino or native Korean numbers first? Learn Sino-Korean first. It is regular, because 23 is simply 이십삼 (2-10-3), and it covers phone numbers, prices, dates and floors. Learn native numbers 1-10 second, with the 개 counter, then extend them only as you need them for ages and counted objects.

Do I need to learn counters? Yes, a few. Native numbers rarely stand alone, since Korean counts objects with a counter word such as 개 (things), 명 (people) or 잔 (cups). Start with 개 and 잔, then add 명 and 살. The remaining counters can wait until you meet the objects they count.

Do I need to read Hangul before starting? Yes, it helps a lot. Every lesson shows numbers in Hangul, and romanization is only a short-term aid. If you cannot read Hangul yet, add a few days at the start for the alphabet, then begin Day 1. Reading the letters first makes the pronunciation notes much easier to follow.

What is the best way to practise Korean numbers? Say numbers aloud with a real purpose, such as reading prices off a receipt or telling the time from a clock. Then review the previous day's numbers before learning new ones, because short, repeated recall beats one long session. Flashcards and quizzes work best as the last five minutes of each day.

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