Thai Alphabet Chart: 44 Letters by Class and Sound

Why this chart is not in alphabet order

Every Thai classroom has the same poster on the wall: 44 letters starting at ก ไก่ and ending at ฮ นกฮูก, each with a little picture of a chicken or an owl. That order is the one dictionaries use, it is the one people recite, and you will need it eventually. It is also the least useful order to learn in, because it scatters the one piece of information that every Thai word depends on.

A Thai letter carries three things: a name, a sound, and a class. The class is mid, high or low, it has nothing to do with the sound, and together with the ending of the syllable and any tone mark it decides which of the five tones comes out of your mouth. ค and ข make the same aspirated k. Read คา and ขา with the same tone and you have said two different things. The traditional order interleaves the classes so thoroughly that a learner reciting it collects 44 names and no way to use them.

So this chart is grouped: nine mid, eleven high, twenty-four low, with the two obsolete letters marked where they fall. The counts everyone quotes — 9 mid, 10 high, 23 low — are the same lists minus ฃ and ฅ.

The nine mid-class letters

Mid class is the smallest group and the one to learn first. It is the only class that can take all four tone marks and produce all five tones, which makes it the class the tone table is easiest to see through. Every letter here is unaspirated: a clean k, t, p, d, b with no puff of air after it.

อ is the odd one. On its own it is not a consonant sound at all but a silent carrier, the letter Thai puts in front of a vowel that would otherwise have nothing to sit on — which is why อาหาร, food, starts with a letter you never hear.

The eleven high-class letters

High class is the group that makes rising tones spellable, and ten of its eleven letters are in everyday use. ฃ ฃอขวด, the bottle, is the one that is not: it dropped out of general use decades ago along with low-class ฅ, and both survive in dictionaries, on old typewriters and in the counts that make the alphabet 44 rather than 42.

ห is the workhorse of this class. It makes an h, it never ends a syllable, and it also parks itself silently in front of low-class letters to lend them its class — หมา, dog, is ม wearing ห so the word can be said with a rising tone.

The twenty-four low-class letters

More than half the alphabet is low class, and that lopsidedness is the shortcut: learn the nine mid and the ten high letters, nineteen in total, and everything you have not deliberately learned is low by default. You will be right almost every time.

Notice how many of these repeat each other. ท ธ ฑ ฒ are all an aspirated t at the front and a plain t at the back. ศ ษ ส are three spellings of one s, and they sit in the high class while ซ, the fourth s, sits here. The duplication is not decoration: it is Sanskrit and Pali spelling preserved on the page long after Thai stopped distinguishing the sounds.

The column most charts leave out

The last column is the one that turns a chart into a reading tool. A Thai letter can sound one way at the start of a syllable and a completely different way at the end, and the ending set is tiny: of the 42 letters in everyday use, 39 can close a syllable and they produce exactly eight sounds between them.

Eighteen letters all land on the same unreleased t. Four give k, seven give p, six give n, and ง ม ย ว give ng, m, y and w one letter each. อ, ห and ฮ never end a syllable at all. So ประเทศ, country, ends in ศ — a letter you may not have met, pronounced s at the front of a word and t at the back — and you can close the syllable correctly without knowing the letter.

This is also why the ending column matters more than it looks: Thai writes no spaces between words, so a final consonant is the closing bracket that tells you a syllable finished and the next one is starting.

Why every letter comes with a chicken

The acrostic names — ก ไก่, ko kai, chicken; ข ไข่, kho khai, egg — are not a children's mnemonic that adults outgrow. They are how Thai people say the letters out loud. Ask someone how a word is spelled and they will answer in acrostic names, because ข ฃ ค ฅ ฆ are all kho and the animal is the only thing that separates them over the phone. It is the same job the NATO alphabet does for alpha, bravo, charlie.

Two of the names carry a warning label. ฃ ขวด and ฅ คน are the obsolete pair: you will meet them in a chart, in a dictionary and essentially nowhere else. Learning their names is worth about a minute; learning to recognise them and move on is worth exactly that much and no more.

How to use a chart without memorising it

A chart is a reference, not a curriculum. It gives you the whole inventory at once, which is useful for looking something up and terrible as a learning order — it has no feedback, it tells you nothing about which letters are frequent, and it asks you to spend the same attention on ฌ, which you will meet a handful of times in your life, as on ก, which is everywhere. That is what a chart skips, and every other way of learning the alphabet skips something too.

Phayan is an app for learning to read Thai script, and it takes the opposite approach to a chart: letters arrive a few at a time in the order that lets you read real words soonest, with audio on every letter and word, and your progress is kept on the device without an account. Level 1 opens with ก, ต and ม, and you are reading มา before you have met a fourth letter. Print the chart, put it on the wall, and use it the way a Thai child does — as the thing you glance at, not the thing you sit and recite.

The one column worth carrying in your head from day one is the class column, because it is the input to the tone rules. Everything else on this chart you can look up. The classes themselves are nineteen letters of deliberate learning and a default for the rest.

Frequently asked questions