Thai Alphabet Chart: All 44 Consonants & 3 Classes
This is the reference chart our Read Thai course is built on — the 44 consonants grouped the way they actually behave when you read.
Thai has 44 consonant letters divided into three classes: high, mid, and low. These classes are not arbitrary groupings — the class of a syllable's initial consonant helps set which of the 5 tones the Thai language gives it. Learn the class system, and you can predict the tone of any Thai word you read.
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The full Thai alphabet has 44 consonants in 3 classes: Middle (9), High (11), and Low (24). Alongside 32 vowel forms and 4 tone marks, these Thai letters are the characters you'll meet on every sign and menu. Each class produces different default tones. Middle class consonants give a mid tone in live syllables, High class gives a rising tone, and Low class gives a mid tone. Tone marks, vowel length, and syllable type (live vs. dead) interact with these classes to produce all 5 Thai tones.
Recognising them is step one — sound out your first Thai word free →
How many letters are in the Thai alphabet?
The Thai alphabet has 44 consonants, 32 vowel forms (15 basic vowels with short and long versions), and 4 tone marks. The consonants are divided into 3 classes—high (11), mid (9), and low (24)—which determine the default tone of each syllable.
Do I need to memorise all 44 consonants before reading?
No. The 7 most common consonants appear on most signs and menus. The Read Thai course teaches consonants in the order you'll meet them in real text, not alphabetically.
How long does it take to learn the Thai alphabet?
Most learners can recognise the high-frequency letters within a week or two of daily practice, and read simple signs in a month. Learning all 44 consonants, the vowels, and the tone rules well enough to sound out new words typically takes 4–8 weeks — faster if you learn them in reading-frequency order rather than alphabetically.
Letters are colour-coded by class. Romanization follows a consistent phonetic scheme with tone marks (à low, á high, â falling, ǎ rising) — and writes Thai's unaspirated stops as g (ก), bp (ป), and dt (ต) so they're not confused with their aspirated cousins.
Middle Class Consonants (9)
กลาง (klaang). Default tone: mid in live syllables, low in dead syllables. These include unaspirated stops (k, t, d, b, p) and the glottal stop.
| Letter | Romanization | Sound | Example Word | Meaning |
|---|---|---|---|---|
| ก | k | g/k (unaspirated) | ไก่ (gài) | chicken |
| จ | j | j | จาน (jaan) | plate |
| ฎ | d | d | ชฎา (chá-daa) | headdress |
| ฏ | t | t | ปฏัก (bpà-dtàk) | goad |
| ด | d | d | เด็ก (dèk) | child |
| ต | t | t | เต่า (dtào) | turtle |
| บ | b | b | ใบไม้ (bai-máai) | leaf |
| ป | p | p | ปลา (bplaa) | fish |
| อ | - | glottal stop | อ่าง (àang) | basin |
High Class Consonants (11)
สูง (sǔung). Default tone: rising in live syllables, low in dead syllables. These are mostly aspirated versions of mid-class sounds, plus fricatives (f, s, h).
| Letter | Romanization | Sound | Example Word | Meaning |
|---|---|---|---|---|
| ข | kh | kh (aspirated) | ไข่ (khài) | egg |
| ฃ obsolete | kh | kh | ขวด (khùat) | bottle |
| ฉ | ch | ch | ฉิ่ง (chìng) | cymbal |
| ฐ | th | th (aspirated) | ฐาน (thǎan) | base |
| ถ | th | th | ถุง (thǔng) | bag |
| ผ | ph | ph (aspirated) | ผึ้ง (phêung) | bee |
| ฝ | f | f | ฝา (fǎa) | lid |
| ศ | s | s | ศาลา (sǎa-laa) | pavilion |
| ษ | s | s | ฤๅษี (reu-sǐi) | hermit |
| ส | s | s | เสือ (sěua) | tiger |
| ห | h | h | หีบ (hìip) | chest |
Low Class Consonants (24)
ต่ำ (dtàm). Default tone: mid in live syllables, high in short dead syllables, falling in long dead syllables. This is the largest class, containing sonorants (m, n, ng, y, r, l, w) and voiced versions of aspirated stops.
| Letter | Romanization | Sound | Example Word | Meaning |
|---|---|---|---|---|
| ค | kh | kh (aspirated) | ควาย (khwaai) | buffalo |
| ฅ obsolete | kh | kh | คน (khon) | person |
| ฆ | kh | kh | ระฆัง (rá-khang) | bell |
| ง | ng | ng | งู (nguu) | snake |
| ช | ch | ch | ช้าง (cháang) | elephant |
| ซ | s | s | โซ่ (sôo) | chain |
| ฌ | ch | ch | เฌอ (choe) | tree |
| ญ | y | y | หญิง (yǐng) | woman |
| ฑ | th | th | มณโฑ (mon-thoo) | Montho |
| ฒ | th | th | ผู้เฒ่า (phûu-thâo) | elder |
| ณ | n | n | เณร (neen) | novice monk |
| ท | th | th | ทหาร (thá-hǎan) | soldier |
| ธ | th | th | ธง (thong) | flag |
| น | n | n | หนู (nǔu) | mouse |
| พ | ph | ph | พาน (phaan) | tray |
| ฟ | f | f | ฟัน (fan) | teeth |
| ภ | ph | ph | สำเภา (sǎm-phao) | junk (boat) |
| ม | m | m | ม้า (máa) | horse |
| ย | y | y | ยักษ์ (yák) | giant |
| ร | r | r | เรือ (reua) | boat |
| ล | l | l | ลิง (ling) | monkey |
| ว | w | w | แหวน (wǎen) | ring |
| ฬ | l | l | จุฬา (jù-laa) | kite |
| ฮ | h | h | นกฮูก (nók-hûuk) | owl |
Paired vs. Unpaired Low-Class Consonants
14 of the 24 low-class consonants share their sound with a high-class consonant — but those 14 letters cover only 7 distinct sounds (kh, ch, th, ph, f, s, h), because several low-class letters make the same sound (ค, ฅ, ฆ are all "kh"). The remaining 10 are unpaired (ง, น, ม, ย, ร, ล, ว, ญ, ณ, ฬ). This distinction matters for tone rules: unpaired consonants use the leading ห technique to reach high-class tones.
Recognising the letters is step one. Now learn to read them.
The Read Thai course teaches all 44 consonants in the order you'll meet them on real signs — plus the vowel system and tone rules. Modules 1–3 are free.
Start reading Thai today
Start the course free →First 3 modules free — no card, and they don't expire.
Prefer a printable version?
Get the one-page chart — all 44 consonants, the vowels, and the tone rules — formatted to print and pin up while you practise.
Why Consonant Classes Matter
The 3-class system is what makes Thai tones predictable. Without it, you would have to memorize the tone of every word individually. With it, you can predict tones from spelling.
Live Syllables (no final stop)
A syllable ending in a sonorant (n, m, ng, y, w) or a long vowel with no final consonant:
Dead Syllables (final stop consonant)
A syllable ending in a stop (k, t, p) or a short vowel with no final consonant:
Tone Marks Change the Rules
Thai has 4 tone marks ( ่ ้ ๊ ๋ ) that override the default tone, but the result of each tone mark depends on the consonant class. For example, the first tone mark ( ่ ) produces a low tone on mid/high class consonants but a falling tone on low class consonants. This is why knowing the class matters even when tone marks are present.
For the complete tone rules chart, see our tone rules reference.
Thai Vowels at a Glance
Consonants are only half the alphabet. Thai vowels come in short and long pairs and sit before, after, above, or below the consonant. Where the consonant sounds carry the syllable, the vowel sounds decide its length and colour. Here are the core vowels and the most common diphthongs, shown on the placeholder consonant อ.
| Vowel (on อ) | Length | Romanization | Example | Meaning |
|---|---|---|---|---|
| อะ | short | a | จะ (jà) | will (future) |
| อา | long | aa | ตา (dtaa) | eye |
| อิ | short | i | สิ (sì) | (particle) |
| อี | long | ii | ปี (bpii) | year |
| อึ | short | eu | หนึ่ง (nèung) | one |
| อือ | long | eu | มือ (meu) | hand |
| อุ | short | u | ดุ (dù) | fierce |
| อู | long | uu | หมู (mǔu) | pig |
| เอะ | short | e | เละ (lé) | mushy |
| เอ | long | ee | เท (thee) | to pour |
| แอะ | short | ae | แกะ (gàe) | sheep |
| แอ | long | ae | แม่ (mâe) | mother |
| โอ | long | oo | โต (dtoo) | big |
| เอาะ | short | aw | เกาะ (gàw) | island |
| ออ | long | aaw | พ่อ (phâaw) | father |
| เออ | long | oe | เธอ (thoe) | you / she |
| เอีย | long | ia | เสีย (sǐa) | to lose / spoil |
| เอือ | long | eua | เรือ (reua) | boat |
| อัว | long | ua | ผัว (phǔa) | husband |
| ไอ / ใอ | short | ai | ไก่ / ใจ (gài / jai) | chicken / heart |
| เอา | short | ao | เรา (rao) | we / us |
| อำ | short | am | น้ำ (náam) | water |
Two things learners always ask: short "o" in a closed syllable is written with no vowel symbol at all (the "implied o" — คน khon, นก nók), and ไอ / ใอ sound identical — ใอ is used in only about 20 traditional words. For all 32 vowel forms and where each one sits, see the full Thai vowels guide.
The 4 Tone Marks
Four tone marks sit above the consonant and change the tone. The mark sets the kind of change; the tone you actually get depends on the consonant's class.
| On อ | Mark | Thai name | Name | Result (mid class) |
|---|---|---|---|---|
| อ่ | ่ | ไม้เอก | mai ek | Low |
| อ้ | ้ | ไม้โท | mai tho | Falling |
| อ๊ | ๊ | ไม้ตรี | mai tri | High |
| อ๋ | ๋ | ไม้จัตวา | mai chattawa | Rising |
The table shows the mid-class case, where each mark gives its namesake tone. On high-class consonants only ไม้เอก (่) and ไม้โท (้) appear (low, then falling). On low-class consonants ไม้เอก (่) gives a falling tone and ไม้โท (้) gives a high tone — which is why ไม้ตรี and ไม้จัตวา rarely show up on low-class letters.
For the full tone-by-class breakdown, see the Thai tone rules reference.
Tips for Memorizing the Chart
Start with Middle Class
There are only 9 middle-class consonants, and they include common letters like ก (k), ด (d), and บ (b). Memorize these first. Everything else is either high or low class — if a consonant is not in your mid-class list, narrow from there.
Use the "Aspirated = High" Shortcut
Most high-class consonants are aspirated versions of sounds: ข (kh), ฉ (ch), ถ (th), ผ (ph), plus the fricatives ฝ (f), ศ/ษ/ส (s), ห (h). If you hear a breathy, aspirated version of a mid-class sound, the letter is likely high class.
Learn the 7 Sonorants
Seven low-class consonants are sonorants — sounds you can hold continuously (ง ng, น n, ม m, ย y, ร r, ล l, ว w). These are always low class, no exceptions, and that pins down 7 of the 24 low-class letters straight away. (In traditional grammar these seven, plus ญ ณ ฬ, make up the 10 "single" low-class letters — but ญ ณ ฬ just repeat the sounds of ย น ล.)
Learn in Pairs, Not Lists
7 sound-pairs link low- and high-class consonants that share a sound: ค↔ข (kh), ช↔ฉ (ch), ท↔ถ (th), พ↔ผ (ph), ฟ↔ฝ (f), ซ↔ส (s), ฮ↔ห (h). Learn each pair together and you memorize two classes at once.
Use the Traditional Chant
Thai schoolchildren learn the alphabet with a chant that pairs each consonant with a keyword: ก ไก่ (k for chicken), ข ไข่ (kh for egg), ค ควาย (kh for buffalo). The keywords serve as built-in mnemonics and are listed in the example word column above.
Focus on the Common 20
Not all 44 consonants appear equally often. The high-frequency starters — ก, ข, ค, ง, จ, ช, ด — turn up on most signs and menus; widen out from there to the common 20 (adding น, ม, ร, ล, ส, ท, พ, บ, ต, อ, ห, ย, ป) before worrying about rare letters like ฌ, ฑ, or ฬ.
Common questions about the Thai alphabet
- What are the 3 consonant classes in Thai?
- Thai consonants belong to one of three classes: Middle class (9 consonants, default mid tone), High class (11 consonants, default rising tone), and Low class (24 consonants, default mid tone). When combined with vowel length, syllable type (live/dead), and tone marks, these classes determine which of the 5 Thai tones a syllable takes.
- Why does Thai have multiple letters for the same sound?
- Thai has 44 consonant letters but only 21 distinct initial sounds. The 'extra' letters exist for two reasons: they belong to different consonant classes (which changes the tone of syllables), and they preserve the original spelling of Pali and Sanskrit loanwords. For example, ส, ศ, and ษ all produce an 's' sound but belong to different classes.
- Are some consonants more important than others?
- Yes. The "high-frequency 7" — ก, ข, ค, ง, จ, ช, ด — appear in the majority of common Thai words. Once you can read these, real-world text starts to make sense.
- Where can I learn to actually read Thai, not just identify the characters?
- The Jam Kham Read Thai course teaches the alphabet plus the tone rules, vowel system, and reading skill — the path from "I know what these letters are" to "I can read this menu." Modules 1–3 are free.
Continue Learning
The chart is the reference. The course is how you actually learn it.
Start reading Thai today
Want the letters in the order you'll actually use them? The Read Thai course teaches the alphabet by frequency, with the tone rules built in.
Start the reading course →First 3 modules free — no card, and they don't expire.