Thai Tones: How the Five Tones Work and How to Read Them

Thai has five tones and four tone marks, and the tone of a word is written in its spelling. What each tone sounds like and how to read it off the page.

22 September 2026·Thai Trainer·Tones

Thai has five tones, and the tone is part of the word. khaa means to be stuck, khâa means value and kháa means to trade. Same consonant, same vowel, three words. Say one with the wrong tone and you have not mispronounced it, you have said something else.

The good news is that Thai writes the tone down. Every syllable carries enough information in its spelling to tell you which of the five tones it takes, so tones are something you can read, not only something you have to hear. This guide covers both halves: what the five tones sound like, and how to work each one out from the letters.

Tone is not intonation

English and Spanish use pitch too, but for attitude. "Really?" rises because it is a question, and the word is still really. In Thai the pitch belongs to the word itself. A question is marked with a particle such as mǎi, and the tones of the other words stay exactly where they are.

That is the whole adjustment. Your voice already makes every one of these shapes. What is new is keeping each word on its own pitch, even when you are asking, doubting or in a hurry.

The five tones

Each tone has a Thai name. Romanised Thai marks them with an accent over the vowel, and the mid tone is the one left unmarked.

Tone	Thai name	Accent	How it sounds	Example
Mid	sǎaman	none	Flat, in the middle of your normal range	khaa, to be stuck
Low	èek	à	Flat and a little below mid, relaxed	khàa, galangal
Falling	thoo	â	Starts high and drops, like a firm "No!"	khâa, value
High	trii	á	High and slightly rising, with some tension	kháa, to trade
Rising	chàttawaa	ǎ	Dips low, then climbs, like a surprised "Really?"	khǎa, leg

The names are ordinals borrowed from Pali: ek is one, tho two, tri three and chattawa four. Saman just means ordinary. Keep those names in mind, because the tone marks are named after them.

The five example words are the classic set: one syllable, khaa, in all five tones. Notice that they are spelled with two different letters, and . That is not a coincidence, and it is the key to reading tones.

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Three things decide the tone

The tone of a written syllable comes from three pieces of information, always the same three:

The class of the first consonant. Every consonant is high, mid or low class. The article on consonant classes explains the three groups and how to memorise them; in short, nine letters are mid, eleven are high, and everything else is low.
Whether the syllable is live or dead. A live syllable ends in a long vowel or in m, n, ng, y or w. A dead syllable ends in a short vowel or in p, t or k.
The tone mark, if there is one.

The four tone marks sit above the first consonant:

Mark	Name
	mai ek
	mai tho
	mai tri
	mai chattawa

There is the naming again. On a mid-class consonant each mark gives the tone it is named after: mai ek gives the ek tone (low), mai tho the tho tone (falling), and so on. On the other classes the same marks shift, which is why a mark is never enough on its own.

Reading a tone, step by step

Ask the questions in this order and you reach the tone every time.

Is there a tone mark?

or appear almost only on mid-class letters, and they give high and rising. tó (table), tǔa (ticket), kǔay-tǐao (noodle soup). Many of the words that use them came from Chinese.
gives low on mid and high letters, falling on low letters. kài (chicken) and khài (egg) are low; phâw (father) and mâe (mother) are falling.
gives falling on mid and high letters, high on low letters. bâan (house) and hâa (five) are falling; náam (water) and cháang (elephant) are high.

No mark, and the syllable is live?

High class gives rising: sǎam (three), mǎa (dog, where the silent makes the syllable high class).
Mid and low class give mid: kin (to eat), plaa (fish), maa (to come), thai (Thai).

No mark, and the syllable is dead?

Mid and high class give low: jèt (seven), hòk (six).
Low class gives high with a short vowel and falling with a long one: rót (car), mâak (very).

That is the entire system. It looks like a lot written out, but notice how little of it is really separate: mid and high letters behave the same with mai ek and mai tho, mid and low behave the same on a live syllable with no mark, and and turn up in only a small set of words.

Why the rules are shaped this way

Look at the khaa set again. (mid), (falling) and (high) are all written with , a low-class letter. (low) and (rising) are written with , its high-class twin. Neither letter can reach all five tones alone. Low class has no low or rising tone without help; high class has no mid or high. Together they cover the five.

So the rules are not arbitrary. They are what is left of an older sound distinction, and the pairs of letters with the same sound exist precisely so that every tone can be spelled. When a low-class letter has no high-class twin, like or , Thai borrows the class of a silent : maa against mǎa, naa (rice field) against nǎa (thick).

Try it on the numbers

The numbers from one to ten are a good first drill, because you will read them on every price tag and menu in Thailand.

Number	Why	Tone
1	silent (high) +	low
2	high class, live	rising
3	high class, live	rising
4	high class +	low
5	high class +	falling
6	high class, dead	low
7	mid class, dead	low
8	mid class, dead	low
9	mid class +	falling
10	high class, dead	low

Look at and : the first has a long vowel, the second a short one, and both are low. On mid and high class a dead syllable is low whatever the vowel. Vowel length only changes the tone of a dead syllable on low class, as in rót (short, high) and mâak (long, falling).

Cover the last column and work each one out before you check it. Then say them aloud: nùeng, sǒng, sǎam, sìi, hâa, hòk, jèt, pàet, kâo, sìp.

Spelling and speech do not always agree

A handful of very common words are spoken with a different tone from the one their spelling gives. (I) and (he, she) are written with rising tones, chǎn and khǎo, and in everyday speech most people say them high: chán, kháo. The question particle mǎi is often said high too. is spelled with a short vowel and pronounced long, náam.

These are exceptions you learn by ear, and there are not many of them. They do not make the rules less useful: the rules get the great majority of words right on first sight, including the thousands you have not heard yet.

How to train your ear

Reading the tone and hearing it are separate skills, and they grow at different speeds. Some habits that help:

Learn words with their tone from day one. A word memorised without its tone has to be relearned later. Write the accent in your notes every time.
Listen to minimal pairs. klâi (near) and klai (far) are the pair every learner mixes up; hearing them side by side is worth more than any description of a falling tone.
Say it before you hear it. Work out the tone from the spelling, say the word, then play the recording. The gap between your guess and the audio is where the learning happens.
Exaggerate at first. Your tones will flatten out in real conversation. Starting with them too big leaves room for that.

Before any of this, the letters have to come for free: you cannot work out a tone while you are still trying to remember which letter you are looking at.

Try it yourself

Answer without scrolling back. The letters below are the ones this article just covered.

Keep going with the full alphabet, audio for every character and quizzes that come back when you are about to forget.

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