English to Thai Translator

Free English to Thai translation, plus the Thai grammar that trips up English speakers.

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What changes when you translate English to Thai

Translating English into Thai changes more than the words. Thai has five tones, writes without spaces between words, has no verb conjugation or plurals, and adds the polite particles ครับ (khrap) and ค่ะ (kha) at the end of sentences. Thai writes sentences without spaces and marks politeness with sentence-final particles, so segmentation and register are the hard parts of translation. A word-for-word tool gets the vocabulary right and these things wrong, which is why the translator above reads the whole sentence before it writes anything.

English and Thai: key differences

English and Thai diverge on the writing system, formality, subject pronouns, and articles. Each row below is a place where swapping words one for one produces the wrong Thai sentence.

Feature	English	Thai
Writing system	the Latin alphabet	the Thai script
Formality	no formal/informal distinction	politeness particles rather than pronouns (ครับ / ค่ะ)
Subject pronouns	required	dropped when context is clear
Articles	definite and indefinite	no articles; classifiers do related work

English to Thai example sentences

Full sentences translated from English to Thai:

English	Thai
Please send the signed document by Friday.	กรุณาส่งเอกสารที่ลงนามแล้วภายในวันศุกร์ Formal administrative request · formal — กรุณา forms an impersonal formal request, and แล้ว marks the completed signing rather than past tense · Standard Central Thai
Could I have two bottles of water?	ขอน้ำสองขวดได้ไหมคะ Polite request at a restaurant · neutral — ขวด is the classifier required after the number, and คะ marks a polite question from a female speaker · Standard Central Thai; female speaker
Did you have breakfast yet?	กินข้าวเช้าหรือยัง Casual morning conversation · informal — Both pronouns are omitted and หรือยัง asks whether the expected action has happened yet · Standard Central Thai
Turn left at the next intersection.	เลี้ยวซ้ายที่สี่แยกข้างหน้า Spoken navigation instruction · neutral — The bare verb is a natural context-supported command; adding an English-style subject would be unnecessary · Standard Central Thai
I can't make it today; could we move it to tomorrow?	วันนี้ไปไม่ได้ ขอเลื่อนไปเป็นพรุ่งนี้ได้ไหมคะ Message rescheduling an appointment · neutral — The participants and appointment are recoverable and omitted, while ได้ไหมคะ softens the rescheduling request · Standard Central Thai; female speaker
The report is still under review.	รายงานยังอยู่ระหว่างการตรวจสอบ Professional status notice · formal — The nominal construction อยู่ระหว่างการตรวจสอบ expresses an ongoing process without inventing an agent · Standard Central Thai
No problem—take your time.	ไม่เป็นไร ค่อย ๆ ทำก็ได้ Reassuring a friend after a delay · informal — ไม่เป็นไร and ค่อย ๆ ทำก็ได้ are idiomatic reassurance, not literal translations of problem or possession of time · Standard Central Thai

Common English to Thai phrases

Everyday expressions translated from English to Thai:

English	Thai (ไทย)
Hello	สวัสดี (sawasdee)
Good night	ราตรีสวัสดิ์ (ratri sawat)
Thank you	ขอบคุณ (khop khun)
Please	กรุณา (karuna)
How are you?	สบายดีไหม (sabai dee mai?)
What is your name?	คุณชื่ออะไร (khun cheu arai?)
I love you	ฉันรักคุณ (chan rak khun)
Excuse me	ขอโทษ (kho thot)
Where is the bathroom?	ห้องน้ำอยู่ที่ไหน (hong nam yu thi nai?)
Goodbye	ลาก่อน (la kon)

About the Thai language

Thai (ไทย) is spoken by about 60 million people across Thailand. It belongs to the Kra–Dai language family and is written in the Thai script.

Native name: ไทย
Speakers: 60 million
Language family: Kra–Dai
Writing system: the Thai script
Word order: subject–verb–object

English to Thai translation tips

English is written in the Latin alphabet, and Thai uses the Thai script, so the translator converts between writing systems for you.
This bundle uses Standard Central Thai, the national standard associated with educated Bangkok usage. Regional varieties such as Northern, Northeastern and Southern Thai should be requested explicitly.
Thai nouns do not normally inflect for number, and counted nouns take classifiers: น้ำสองขวด is literally water two bottle-classifier. Choose the classifier for the noun and meaning rather than defaulting blindly to อัน.
Thai verbs do not inflect for person or tense. Time expressions and particles such as แล้ว, กำลัง, อยู่ and ยัง establish aspect or timing only when the context calls for them.
Pronouns are often omitted when participants are clear. Polite particles are speaker-sensitive—ครับ is typical for a male speaker and ค่ะ or question-form คะ for a female speaker—so do not mix them silently. Thai script does not put spaces between every word.

English to Thai translation FAQ

How accurate is AI English to Thai translation?

The translator uses a modern AI language model that understands context, so English to Thai results read more naturally than word-for-word tools. For legal, medical, or other high-stakes text, have a fluent speaker review the output.

How do you say hello in Thai?

Hello in Thai is สวัสดี (sawasdee). The common-phrases table on this page lists more everyday Thai expressions, such as ขอบคุณ (khop khun) (thank you) and ลาก่อน (la kon) (goodbye).

Why does Thai need a word between a number and a noun?

Thai normally counts with a classifier in the order noun + number + classifier. The correct classifier depends on what is counted; for example, ขวด is used for bottles.

Should a Thai translation include ครับ or ค่ะ?

Use a polite particle when the social setting calls for it and the speaker information is known. ครับ typically marks a male speaker, while ค่ะ and question-form คะ typically mark a female speaker; an impersonal formal instruction may avoid either.

Sources

The language facts and grammar notes on this page are checked against these references.

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