Question 1

How many letters are in the Thai alphabet?

Accepted Answer

The Thai script has 44 consonant letters, though only about 21 stand for distinct sounds — many letters share a pronunciation, a legacy of the Sanskrit and Pali words Thai borrowed and spelled faithfully. Alongside them are vowel symbols that combine into 32 vowel forms, four tone marks, and ten numerals. Two of the 44 consonants, ฃ and ฅ, have fallen out of modern use.

Question 2

What are the three Thai consonant classes?

Accepted Answer

Every Thai consonant belongs to one of three classes — middle (กลาง), high (สูง), or low (ต่ำ). The class isn't about the letter's own sound but about tone: together with the vowel length, the syllable type, and any tone mark, the initial consonant's class decides which of Thai's five tones a syllable takes. There are 9 middle-class, 11 high-class, and 24 low-class consonants.

Question 3

Why does Thai have two obsolete letters?

Accepted Answer

Two consonants — ฃ (kho khuat) and ฅ (kho khon) — have dropped out of modern Thai. Their sounds merged with ข and ค, which took their place, so you'll almost never meet them in everyday writing. They're still counted among the official 44 and still sit on Thai keyboards, so they're worth recognising.

Question 4

Why does each Thai letter have a name like "ko kai"?

Accepted Answer

Each consonant has a two-part name: its sound plus a familiar word that starts with it — ก is "ko kai", where kai (ไก่) means "chicken". Because many letters share a sound, that second word tells them apart when spelling aloud, the way English speakers say "B as in boy". Thai children learn the alphabet this way, and the names double as a first handful of vocabulary.

Question 5

Do you need to learn the alphabet to read Thai?

Accepted Answer

Yes — Thai is written with no spaces between words and is rarely romanised consistently, so reading menus, signs, or subtitles means reading the script itself. But you don't have to memorise all 44 letters in isolation first. Learn them by class, with their sounds, and the tone rules start to click — and from there, the reading follows.

The Thai script.

Practice

Recognition ๔

Production ๓

Reference

Consonants

Vowels

Tones

Numerals