RianThai — Learn Thai: Dictionary, Alphabet, and Reference Tools
Free Thai-English dictionary with audio pronunciation

Learn ภาษาไทย
at your own pace

A Thai-English dictionary with Pali and Sanskrit word origins, alphabet guides, pronunciation for every word, and interactive learning tools.

English ↔ Thai
Pali & Sanskrit origins
3 source dictionaries
Everything in one place

Tools for every stage of learning

From your first letter to reading Thai text — dictionary, alphabet, and reference tools all in one place.

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Thai Transliteration

Convert Thai script to Paiboon+, RTGS, IPA, or TLC. Four romanization systems for teachers and learners.

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Thai Dictionary

Thai-English dictionary with definitions from Royal Institute, Volubilis, and Lexitron. Audio pronunciation and Pali/Sanskrit etymologies.

ก

Thai Alphabet

44 consonants and 32 vowels with class colors, pronunciation guides, and audio for every letter.
๑๒๓

Thai Numbers

Thai numerals with pronunciation, transliteration, and practice exercises.

Thai Calendar

Thai date converter, Buddhist era years, and cultural calendar reference.

Thai typing trainer

Kedmanee-layout drills with finger guides and error tracking — practice in your browser.
Thai Alphabet

44 consonants to master

Each letter links to its dictionary page with all words starting with that consonant.

High class (11)
Middle class (9)
Low class (24)
ก ข ฃ ค ฅ ฆ ง จ ฉ ช ซ ฌ ญ ฎ ฏ ฐ ฑ ฒ ณ ด ต ถ ท ธ น บ ป ผ ฝ พ ฟ ภ ม ย ร ล ว ศ ษ ส ห ฬ อ ฮ ฦ ฤ
Explore the full alphabet Browse dictionary

Dictionary

The Thai-English dictionary combines data from three sources:

  • Royal Institute Dictionary (พจนานุกรม ฉบับราชบัณฑิตยสถาน) — the official Thai monolingual dictionary with English translations of definitions
  • Volubilis — a Franco-Thai lexicographic project with detailed definitions and classification
  • Lexitron — a Thai-English dictionary developed by Thailand's National Electronics and Computer Technology Center (NECTEC)

Over 19,000 words with English translations based on data from Wiktionary and the Royal Institute Dictionary. Audio pronunciation for all Thai and English words, Pali and Sanskrit etymologies, classifiers, antonyms, synonyms, and usage examples.

Reference Tools

  • Thai Alphabet — 44 consonants and 32 vowels with pronunciation and consonant classes
  • Thai Numbers — numerals with transliteration and audio
  • Thai Calendar — Buddhist era dating, months, days of the week, Thai and Buddhist holidays
  • Pali Transliteration — convert between Pali scripts and Roman transliteration