Korean Consonants: 19 Sounds and the Plain–Aspirated–Tense Trick
Korean has 19 consonants — 14 basic and 5 tense — and they're organized by where your mouth makes them, not alphabet order. The real trick is the plain-aspirated-tense triads (ㄱ/ㅋ/ㄲ, ㄷ/ㅌ/ㄸ, ㅂ/ㅍ/ㅃ, ㅈ/ㅊ/ㅉ): three versions of nearly the same sound your mouth already makes in English words like gun, kick, and skill.
Most Hangul charts list all 19 consonants in dictionary order and expect you to just absorb them, like memorizing a phone book. That's the wrong shape for this alphabet. Korean consonants were designed around five places in your mouth, and the moment you learn them by place instead of by order, the whole system stops being 19 random shapes and starts being about five ideas with small variations.
This guide covers all 19 in that grouping, the plain-aspirated-tense pattern that trips up almost every beginner, and two sound rules — ㄹ and ㅅ — that textbooks mention once and then never explain properly. If you haven't done the vowels yet, do that first; consonants only make sense once you can hold a vowel steady next to them.
The 19 consonants, grouped by what your mouth is doing
14 are basic, 5 are tense versions of five of those basics. Group them by articulation point and the shapes stop feeling arbitrary — several of them are quite literally little diagrams of your mouth mid-sound.
| Mouth position | Letters | What's physically happening |
|---|---|---|
| Velar — back of the tongue | ㄱ ㅋ ㄲ | Tongue root presses the back of your throat, like the start of 'gun' or 'kick' |
| Alveolar — tongue tip | ㄴ ㄷ ㅌ ㄸ ㄹ | Tongue tip taps the ridge right behind your top front teeth |
| Bilabial — lips | ㅁ ㅂ ㅍ ㅃ | Lips close fully, then release — 'm', 'b', 'p' territory |
| Sibilant — narrow gap | ㅅ ㅆ | Air hisses through a thin channel; no aspirated partner exists for this pair |
| Affricate — tongue + hiss | ㅈ ㅊ ㅉ | Starts like ㄷ, releases like ㅅ — a fused 'j' / 'ch' sound |
| Glottal — throat only | ㅎ | Just breath, same as English 'h' |
One letter sits outside this table on purpose: ㅇ. At the start of a syllable it's silent — a placeholder so the block has a consonant slot to fill, which is why 아 is just "a". As a batchim (bottom-of-block consonant) it turns into "ng", so 강 is "kang". It's not really a consonant sound so much as two different jobs wearing the same costume.
The plain–aspirated–tense trick: ㄱ/ㅋ/ㄲ and friends
This is the single most useful pattern in the alphabet, and most courses bury it in a footnote. Four of the mouth-position groups above actually split into three-way sets: plain, aspirated, tense — the same base sound produced with three different amounts of air and throat tension.
- ㄱ / ㅋ / ㄲ — g-ish / k with a puff of air / tight k with no air at all
- ㄷ / ㅌ / ㄸ — d-ish / t with air / tight t
- ㅂ / ㅍ / ㅃ — b-ish / p with air / tight p
- ㅈ / ㅊ / ㅉ — j-ish / ch with air / tight j
You already produce all three without knowing it. Say "gun," "kick," and "skill" back to back and pay attention to the first consonant sound. "Gun" is soft — that's plain (ㄱ). "Kick" has a real puff of air on the K — that's aspirated (ㅋ). But the "k" buried inside "skill," right after the s, has no puff at all and a tighter throat — that's tense (ㄲ). English speakers spend weeks trying to invent the tense sound when it's already hiding in their own s-clusters.
불 · 풀 · 뿔
bul · pul · ppul
fire · grass · horn
same vowel, three tensions of ㅂ/ㅍ/ㅃ
달 · 탈 · 딸
dal · tal · ttal
moon · mask · daughter
ㄷ/ㅌ/ㄸ in one breath
자다 · 차다 · 짜다
ja-da · cha-da · jja-da
to sleep · to kick · to be salty
ㅈ/ㅊ/ㅉ — say all three, notice only your throat changes
ㄹ is neither R nor L — it changes by where it sits
This is the letter that confuses learners longest, mostly because English forces every sound into either "r" or "l" and Korean's ㄹ refuses to pick a side. It's a single sound — a flap of the tongue tip — that lands differently depending on position.
| Position | How it sounds | Example |
|---|---|---|
| Starting a syllable, before a vowel | A quick tap — closest to the American "tt" in "butter" | 라면 (ra-myeon) — instant noodles |
| Between two vowels | Same tap, even lighter | 사랑 (sa-rang) — love |
| As batchim, or before another consonant | A held "L", tongue stays on the ridge | 달 (dal) — moon; 알겠어요 (al-ge-sseo-yo) — got it |
| Doubled, ㄹㄹ | A clear, held "L" | 빨리 (ppal-li) — quickly |
Stop trying to decide if it's an r or an l. It's a tap that gets held longer when it's blocking off a syllable and stays quick when it's opening one. Say 사랑해 slowly and you'll feel the tongue barely touch before bouncing off — that's the whole sound.
Why 시 sounds like "shi," not "si"
Here's the rule nobody states plainly: ㅅ before ㅣ (or a y-vowel) turns into an "sh" sound. 시 is pronounced "shi." 신발 (shoes) is "shin-bal," not "sin-bal." This isn't an exception you memorize word by word — it's automatic, the same way English speakers automatically say "choo" for "tune" in casual speech without anyone teaching them to. Once you know the rule, every 시-syllable you've already heard in dramas clicks into place.
우리 몇 시에 만나요?
u-ri myeot si-e man-na-yo?
What time should we meet?
일곱 시 어때요?
il-gop si eo-ttae-yo?
How about seven o'clock?
좋아요! 이따 봐요.
jo-a-yo! i-tta bwa-yo.
Sounds good! See you later.
Frequently asked questions
How many consonants does Korean have?
19 letters: 14 basic (ㄱㄴㄷㄹㅁㅂㅅㅇㅈㅊㅋㅌㅍㅎ) and 5 tense (ㄲㄸㅃㅆㅉ), which are doubled versions of five of the basics. ㅇ is a special case — silent at the start of a syllable, pronounced "ng" only at the end.
What's the difference between plain, aspirated, and tense consonants?
Same place in the mouth, different airflow and throat tension. Plain (ㄱㄷㅂㅈ) is soft, aspirated (ㅋㅌㅍㅊ) adds a puff of air, and tense (ㄲㄸㅃㅉ) tightens the throat and blocks the air almost entirely — like the "k" in "skill" versus "kick."
Is ㄹ pronounced like R or L?
Both, depending on position. At the start of a syllable it's a quick tongue tap close to an English "r" (라면). As a batchim or doubled (ㄹㄹ), it's a held "L" sound (달, 빨리). It's one underlying sound with two positional outcomes, not two different letters.
Why does 시 sound like "shi" instead of "si"?
ㅅ automatically shifts toward "sh" whenever it's followed by ㅣ or a y-vowel (ㅑㅕㅛㅠ). It's a built-in pronunciation rule, not an irregular word — every 시, 셔, 샤 syllable in the language follows it the same way.
Do I need to learn all 19 consonants before moving on?
Recognize all 19 shapes and know the plain-aspirated-tense groupings before moving to grammar — that takes a focused afternoon. Perfecting the tense sounds by ear takes longer and improves naturally through listening, so don't let that slow down your first month.
Which Korean consonants don't exist in English?
The five tense consonants (ㄲㄸㅃㅆㅉ) have no direct English letter, though the sound itself exists hidden inside English s-clusters like "sky," "sty," and "spy." ㄹ is also not a clean match for either English "r" or "l."