How to Learn the Thai Alphabet, One Consonant Class at a Time
Learn the Thai alphabet by consonant class, not in alphabet order. Start with the nine mid-class consonants. Add one long vowel so you can read your first syllables, then learn the high class and the low class, then the short vowels and the final consonants, and only then the tone rules. Each step uses the one before it, because the class of a syllable's first consonant is one of the three things that decide its tone.
This post gives the order, says why each step sits where it does, and points at a free place to practise it. For the whole system in one page, see the Thai script explained.
The traditional order hides the one thing you need
Thai has 44 consonants, and the traditional order lists them by sound. It is the order a dictionary follows, and it is the one most charts print. Here are the first ten with their classes:
| Letter | Name | Class |
|---|---|---|
| ก | gor gai | mid |
| ข | khor khai | high |
| ฃ | khor khuat | high |
| ค | khor khwai | low |
| ฅ | khor khon | low |
| ฆ | khor rakhang | low |
| ง | ngor ngu | low |
| จ | jor jan | mid |
| ฉ | chor ching | high |
| ช | chor chang | low |
Read the class column from the top: mid, high, high, low, low, low, low, mid, high, low. Nothing in that order tells you which letters behave alike. That is fine for finding a word in a dictionary. It is awkward for learning to read, because the class is the very thing you need to know next.
The class comes first because it is the one fact you can't work out
Three things decide the tone of a Thai syllable: the class of its first consonant, whether the syllable is live or dead, and which tone mark it carries. The second and third you can see on the page, in the vowel, the ending and the mark. The first you can't. Class is a property of the letter, and you learn it letter by letter, the way you learn that a French noun is masculine or feminine.
So the first job is to learn letters in their class groups, and the groups are small enough to do that: nine mid-class consonants, eleven high-class and twenty-four low-class. The consonant classes explained post covers why the classes exist.
The order, step by step
| Step | You learn | Why it sits here | Practise it |
|---|---|---|---|
| 1 | The mid-class consonants | The smallest class, and its tone rules are the plainest | Mid-class consonants |
| 2 | One long vowel, and your first syllables | A consonant alone is not a syllable | The vowel chart |
| 3 | The high-class consonants | Its rules match the mid class in four of five rows | High-class consonants |
| 4 | The low-class consonants | The biggest class, and the rules that differ most | Low-class consonants |
| 5 | Short vowels and final consonants | They decide whether a syllable is live or dead | The alphabet chart |
| 6 | The tone marks and the five tones | Now you have all three things that decide a tone | Tone rules practice |
| 7 | Compound vowels, then real words | Everything before this was a part of a word | Reading practice |
The rest of this post takes the steps one at a time.
Start with five letters, not forty-four
The course's first lesson uses five mid-class consonants: ก, จ, ด, ต and บ. That is enough to learn how a Thai letter is named, which is a sound plus a word that begins with it, the way "A is for Apple" works. ก is gor gai, and gai means chicken. The word is a picture to hang the sound on, and you don't need to memorise it.
Mid class goes first because its tone rules are the plainest. A live syllable with no tone mark has the mid tone, a mark moves it to low or falling, and a dead syllable is low. The other mid-class letters, ป and อ, come next. The last two, ฎ and ฏ, are rare, and they wait.
Add one long vowel and read
A consonant alone is not a syllable, and a list of letters you can name is not reading. So the second step is one long vowel, า, and the first syllables you get from it: กา, ดา, ตา. They are small, and sounding them out is reading. That is the moment the alphabet stops being a list.
The high class has one new rule, and the low class has most of them
The high class has eleven letters. Its tone rules match the mid class in four of the five rows of the tone rules chart, and differ in one: a live syllable with no tone mark is rising instead of mid. What you learned for the mid class still holds, so the high class is mostly new letters and one new rule.
The low class is the opposite. It has twenty-four letters, more than half of the alphabet, and its tone rules differ from the mid class in four of the five rows. That is why it comes last of the three. By then you can read, and the syllables you meet carry the new rules.
Short vowels and endings tell you live from dead
Whether a syllable is live or dead depends on its vowel and on how it ends, so the short vowels and the final consonants come before the tone rules. A syllable that ends in a long vowel, or in a nasal such as น, ม or ง, can be held, and it is live. A syllable that ends in a short vowel, or in a stop such as ก, ด or บ, cuts off, and it is dead. The tone chart has a row for each, so you can't read a tone until you can tell which one you have.
The tones come last, when you can see all three things
Now the tone rules have something to work on. You look at the first consonant for its class, at the vowel and the ending for live or dead, and at the top of the consonant for a mark. The tone rules chart puts the three in one table, with a real word in each cell. The tone rules practice gives you a new syllable every time and shows the whole derivation when you answer.
Leave eight letters until you meet them
Two of the 44 consonants, ฃ and ฅ, are no longer used, and you never need them. Eight more are rare: they appear in a small closed set of words, nearly all of them loans from Pali and Sanskrit. Some of those words are everyday ones, so don't skip a rare letter when it turns up. ษ is in ภาษา, language, ฬ is in กีฬา, sport, and ฎ is in กฎ, rule. The alphabet chart suggests starting with the 34 letters that are neither rare nor obsolete.
Practise by reading, not only by recognising
Recognising a letter is not the same as reading with it. After each step, read something that uses what you have just learned: a syllable you build yourself, then a real sign or a menu. The reading practice has real signs and menu words to read as your letters grow.
A printed chart helps while you do this. The free Thai alphabet PDF has the chart, the tone rules and the vowels on one page each.
Frequently asked questions
Is the Thai alphabet easy to learn?
It has more letters than the Latin alphabet, with 44 consonants and 24 vowel forms in the chart of this course. It is also regular. Each consonant has a fixed sound at the start of a syllable and another at the end, and the tone follows from the rules above. What takes practice is the tone rules, and the spelling of words that Thai borrowed from other languages. How long it takes depends on how often you practise, so I won't give you a number.
Do I need to learn the letter names?
You need to recognise the letters, and the names help. Each name is a sound plus a word that starts with it, so ก is gor gai, chicken. Thai children learn the alphabet that way, and the word gives your memory a picture. You don't have to memorise the example words.
Where can I practise for free?
The alphabet chart plays every letter. The first lesson is free. It opens with a short warm-up, where you pick letters out by sight before the explanation begins.