How a Hangul Block Works
This is the part that separates people who have “learned the alphabet” from people who can actually read. Hangul does not write letters in a line like English. It packs one syllable into one square block, and the letters go in fixed positions inside it.
Every block follows the same order — initial consonant, vowel, then optional final consonant — and the layout depends on the vowel:
| Vowel shape | Where it goes | Example |
|---|---|---|
| Vertical (ㅏ ㅑ ㅓ ㅕ ㅣ) | To the right of the consonant | ㄴ + ㅏ = 나 (na) |
| Horizontal (ㅗ ㅛ ㅜ ㅠ ㅡ) | Underneath the consonant | ㄴ + ㅜ = 누 (nu) |
| Final consonant (batchim) | At the bottom, always | ㄴ + ㅏ + ㅁ = 남 (nam) |
The silent ㅇ
- A block must start with a consonant. When a syllable begins with a vowel sound, ㅇ fills the slot and is silent: 아 is just a, 오 is just o.
- But at the bottom of a block, the same ㅇ is pronounced -ng: 강 is gang, 방 is bang.
- One letter, two jobs, decided entirely by position. This catches every beginner exactly once.
The 14 Basic Consonants
| Letter | Sound | Notes |
|---|---|---|
| ㄱ | g / k | Between English g and k |
| ㄴ | n | |
| ㄷ | d / t | Between English d and t |
| ㄹ | r / l | r between vowels, l at the end of a block |
| ㅁ | m | |
| ㅂ | b / p | Between English b and p |
| ㅅ | s | Becomes sh before ㅣ: 시 is shi |
| ㅇ | silent / ng | Silent at the start, -ng at the bottom |
| ㅈ | j | |
| ㅊ | ch | Aspirated ㅈ — note the extra stroke |
| ㅋ | k | Aspirated ㄱ |
| ㅌ | t | Aspirated ㄷ |
| ㅍ | p | Aspirated ㅂ |
| ㅎ | h |
Notice the pattern in ㄱ→ㅋ, ㄷ→ㅌ, ㅂ→ㅍ, ㅈ→ㅊ: an extra stroke means an extra puff of air. Hangul was designed in the 1440s to be systematic, and this is one of the places it shows. You are learning four pairs, not eight unrelated shapes.
The 10 Basic Vowels
| Letter | Sound | Letter | Sound |
|---|---|---|---|
| ㅏ | a (father) | ㅑ | ya |
| ㅓ | eo (son) | ㅕ | yeo |
| ㅗ | o (go) | ㅛ | yo |
| ㅜ | u (moon) | ㅠ | yu |
| ㅡ | eu | ㅣ | i (machine) |
The same logic again: a second short stroke adds a y-. ㅏ becomes ㅑ, ㅗ becomes ㅛ. Five vowels plus one rule gives you ten.
The two that English speakers find genuinely new are ㅓ and ㅡ. ㅓ is not the o of “go” despite the common eo spelling — it is closer to the vowel in “son.” ㅡ has no English equivalent at all: say “ee” and then pull your lips flat and wide.
Tense Consonants and Compound Vowels
| Tense | From | Sound |
|---|---|---|
| ㄲ | ㄱ ㄱ | kk — tighter, no puff of air |
| ㄸ | ㄷ ㄷ | tt |
| ㅃ | ㅂ ㅂ | pp |
| ㅆ | ㅅ ㅅ | ss |
| ㅉ | ㅈ ㅈ | jj |
Tense consonants are the hardest sound in Korean for most learners, because English has no three-way contrast. 사다 sada (to buy) and 싸다 ssada (to be cheap) are different words. The tense version is said with a tight throat and no breath — think of the p in “spy” rather than “pie.”
| Compound | Sound | Compound | Sound |
|---|---|---|---|
| ㅐ | ae | ㅒ | yae |
| ㅔ | e | ㅖ | ye |
| ㅘ | wa | ㅙ | wae |
| ㅚ | oe | ㅝ | wo |
| ㅞ | we | ㅟ | wi |
| ㅢ | ui |
Good news: in modern Seoul speech ㅐ and ㅔ sound the same, and so do ㅙ, ㅚ and ㅞ. Younger Koreans cannot hear the difference either — they just have to memorise which spelling each word uses, exactly like English speakers with their and there.
Batchim: The Final Consonant Rule
A consonant at the bottom of a block is called batchim (받침), and this is where reading gets interesting. Korean allows only seven sounds in that position, so many letters collapse together when they land there.
| Pronounced as | Written letters that produce it | Example |
|---|---|---|
| k | ㄱ ㅋ ㄲ | 부엌 = bu-eok (kitchen) |
| n | ㄴ | 산 = san (mountain) |
| t | ㄷ ㅅ ㅆ ㅈ ㅊ ㅌ ㅎ | 옷 = ot (clothes), not os |
| l | ㄹ | 물 = mul (water) |
| m | ㅁ | 밤 = bam (night) |
| p | ㅂ ㅍ | 밥 = bap (rice) |
| ng | ㅇ | 강 = gang (river) |
And the rule that unlocks natural-sounding Korean: when a block ending in a consonant is followed by a block starting with the silent ㅇ, the consonant slides across. 한국어 is written han-guk-eo but pronounced han-gu-geo. 음악 is written eum-ak but said eu-mak. Full detail in our batchim guide.
Hangul is day one. Hanguljo is the rest.
Once you can read blocks, Hanguljo takes you from there through the full TOPIK 1–6 path: every word and grammar point with native audio, an exclusive mnemonic for every word, and an SRS engine that reviews you right before you would forget. It also has conversation lessons, shadowing with your own microphone, reading and listening practice, an OCR scanner for real signs and menus, and lock screen and home screen widgets.
Learn Korean with Hanguljo - FreeFrequently asked questions
How many letters are in the Korean alphabet?
24 basic letters — 14 consonants and 10 vowels. With the five tense consonants and eleven compound vowels, 40 in total. That is the entire writing system; there is nothing beyond it.
How long does it take to learn Hangul?
A day or two to recognise the letters, about a week to read blocks smoothly, two to three weeks to read without thinking. King Sejong's stated goal in 1443 was that a wise person could learn it in a morning, and that is not far off.
Why does 한국 sound like “hanguk” and not “han-gook”?
Because ㅜ is the u of “moon” but short, and ㄱ at the bottom of a block is an unreleased k. Romanisation smooths over both, which is one reason to stop relying on it early.
Do I need to learn stroke order?
Less than in Chinese or Japanese, but it helps: left to right, top to bottom. It matters mostly if you plan to handwrite or use handwriting input on a phone.
What comes after Hangul?
The particles (은/는, 이/가, 을/를) and the verb endings. Korean grammar is where the real work starts, and it is worth beginning as soon as you can read blocks — see our particles guide.