How to Say Hello in Thai: Sawatdee, Khrap and Kha

You only need one word to start every conversation in Thailand: sawatdee. It’s the standard greeting from breakfast to last call, it also means goodbye, and the only real decision you have to make is which one-syllable particle to stick on the end. This guide goes deep on that single word, exact pronunciation, the khrap/kha rule, the casual shortcut, the wai that often comes with it, and the small mistakes worth avoiding, so you can say hello in Thai correctly from the moment you land.

This is a spoke off outthailand.com’s basic Thai phrases hub, which covers the wider phrasebook: thank you, numbers, food and directions. If you only learn one more phrase after this, make it how to say thank you in Thai, the two together carry most daily interactions.

How do you say hello in Thai?

Hello in Thai is สวัสดี, romanised as “sawatdee” and pronounced roughly sà-wàt-dii (say it like “sa-WAT-dee,” with a touch of emphasis on the middle syllable). It’s a genuinely all-purpose greeting: you can use it walking into a 7-Eleven, checking into a guesthouse, meeting a tour guide, or passing a neighbour on the street. There’s no separate word for “hi” versus a more formal “good day”, sawatdee covers the whole range. Pair it with a smile, and it’s one of the highest-value single words a visitor can learn.

Romanisations are pronunciation cues; Thai spelling systems vary between sources.

What is the khrap and kha rule, and why does it matter here?

This is the one detail that turns “sawatdee” from a bare word into a polite greeting. Thai sentences take a gender-based particle at the end: men and boys add “khrap” (often heard closer to “krup”), and women and girls add “kha.” So a man says “sawatdee khrap,” and a woman says “sawatdee kha.” The particle carries no direct English translation, it functions like a small verbal bow, signalling respect and warmth. You can technically say just “sawatdee” without it, and you’ll be understood, but you’ll sound abrupt, almost like dropping “please” from a request in English. Attach the particle every time and the greeting lands the way it’s meant to.

Does sawatdee also mean goodbye?

Yes, and this is what makes it such an efficient word to learn. Where English needs “hello” for arriving and “goodbye” or “bye” for leaving, Thai uses “sawatdee” for both. Walk into a shop and say “sawatdee khrap/kha,” and you can say the exact same thing on your way out. There’s no risk of using the wrong greeting at the wrong end of an interaction, one phrase, two jobs. That said, more relaxed farewells like “bai la” (I’m going) or “laew jer gan” (see you later) exist for casual goodbyes with people you know, but you won’t need them to get by.

Do you need a different greeting for morning, afternoon or evening?

No. Unlike languages that split greetings into “good morning,” “good afternoon” and “good evening,” everyday Thai doesn’t require that distinction, “sawatdee” works at any hour. There are more literary or formal time-specific phrases in the language, but they’re not part of standard spoken use and travellers never need them. This is one less thing to memorise: whether you’re ordering breakfast at a market at 7am or checking into a hotel at 9pm, the greeting doesn’t change.

Is there a casual way to say hello in Thai?

Yes, “wadee” is a shortened, informal version of sawatdee, dropping the first syllable. Thai speakers use it between friends, with family, or in relaxed everyday exchanges, including answering the phone. As a visitor, it’s fine to recognise “wadee” when you hear it and even use it once you’re on familiar terms with someone, but as a general rule, stick to the full “sawatdee khrap/kha” with hotel staff, shopkeepers, older people, or anyone you’ve just met. The full version is never wrong; the casual one can read as too familiar in the wrong context.

Should you do the wai when you say hello?

Often, but you don’t strictly have to. The wai, palms pressed together in front of the chest with a slight bow, is the traditional Thai gesture that frequently accompanies a greeting, especially in more formal, traditional or respectful contexts, like greeting an elder or a monk. It’s genuinely subtle etiquette, who wais first, how high the hands go, and tourists aren’t expected to get it exactly right. In casual, everyday interactions (a convenience store, a taxi, a street stall), a warm “sawatdee khrap/kha” with a smile and a nod is entirely enough. If someone offers you a wai, it’s polite to return a gentle one. For more on the gesture itself and its broader etiquette, see the wai section of our basic Thai phrases guide.

What if you get the pronunciation wrong?

Don’t let this stop you. Thai is a tonal language, meaning pitch changes a word’s meaning, which is the main hurdle for English speakers used to tone carrying emotion, not meaning. The reassuring part: “sawatdee” is such a common, contextually obvious greeting that Thai listeners will understand you almost regardless of your tone or accent, nobody is going to mishear a greeting as something else mid-handshake. Locals are used to foreigners attempting Thai and consistently respond warmly to the effort. Aim for “close enough” and a friendly tone, not textbook-perfect pitch.

What comes after hello?

Once you’ve greeted someone, the natural next phrase is “sabai dee mai?” (how are you?), pronounced roughly sà-baai-dii-măi. The typical reply is “sabai dee” (I’m fine), optionally with your khrap/kha particle: “sabai dee khrap/kha.” It’s a small-talk staple with hotel staff, drivers and shopkeepers, and using it after “sawatdee” signals a bit more warmth than the greeting alone. From here, most other everyday exchanges, ordering food, asking prices, saying thank you, are covered in the wider basic Thai phrases hub.

Is it fine to just say hello in English?

Completely. In hotels, restaurants, malls and most tourist-facing businesses across Thailand, English greetings are understood without issue, you will never be stuck for failing to say “sawatdee.” The reason to learn it anyway is goodwill, not necessity: Thai people consistently notice and appreciate a visitor making the effort, and a greeting in Thai tends to earn a warmer, friendlier response than “hi” or “hello” would. It costs nothing to try and it’s the lowest-effort, highest-return phrase in the whole language.

Where to next

Now that hello is covered, keep building: how to say thank you in Thai is the natural next phrase, and Thai numbers help with prices and markets. For the full phrasebook, including food, directions and the wai, head back to the basic Thai phrases hub. Then put your new greeting to use, browse what’s on right now in the Thailand events listings.

Sources

• Standard Thai-language travel and phrasebook references for “sawatdee,” the khrap/kha politeness particles, and the casual “wadee” form.
• General linguistic references on Thai as a tonal language with five tones.
• Cultural guides on the wai greeting gesture and its everyday versus formal etiquette.