Landed in Lisbon after learning “oi” from a Brazilian app? Here is how to say hello in Portuguese: olá is the literal “hello” and the standard greeting in Portugal, while oi is the everyday Brazilian hello.
Greetings are the first step in how to learn slang in a new language. The choice between formal, neutral and slangy openers depends on the country, the time of day and who you are talking to.
Olá versus oi: the first misunderstanding
Olá is the literal translation of “hello”, according to Learn Portuguese. PortuguesePod101 adds that olá is the standard greeting expression in Portugal. The same source calls oi a universal greeting in Brazil, and Migaku describes it as what Brazilians actually say: super casual and perfect for friends.
The difference between oi and olá is therefore about country and register, not meaning. In Brazil, oi is the natural default. In Portugal, olá is the safer and more standard choice. If you are unsure where your listener is from, olá is the word that simply means hello.
Learners often carry three assumptions into their first conversations. Each one is only partly true:
- “Oi and olá are interchangeable.” Both mean hello, but oi is tied to casual Brazilian speech, while olá is the standard greeting in Portugal. Match the word to the place first.
- “Brazilians and Portuguese speakers greet in the same way.” The words overlap, but pronunciation, slang and physical greetings differ, as the comparison below shows.
- “Slang is fine with anyone.” Slang greetings such as e aí are limited to friends, and the casual section below explains where each one stops being appropriate.
Brazilian and European Portuguese greetings side by side
Brazilian Portuguese and European Portuguese share the same core vocabulary, but the everyday choices diverge. This table gathers the differences that matter most in the first minute of a conversation.
| Situation | Brazilian Portuguese | European Portuguese | Planning use |
|---|---|---|---|
| Everyday hello | Oi, a universal greeting | Olá, the standard greeting | Pick the word that fits your destination. |
| Slang opener | E aí? (“what’s up?”), for friends only | Viva, heard in Portugal more than in Brazil | Recognise these when you hear them; use them only once you know the person. |
| Sound of tudo bem | “TOO-doo bang” | “TOO-doo beng” | Change the final vowel sound to match your listener. |
| Sound of dia | “jee-ah” | “dee-ah” | This also changes how bom dia sounds. |
| Physical greeting | Cheek kisses vary by city: two in Rio, one in São Paulo | Handshakes are the norm in formal settings | Follow the other person’s lead rather than initiating a kiss. |
Figures and examples above come from Migaku’s Portuguese greetings guide and PortuguesePod101’s hello guide.
The tone also differs. Migaku says Brazilian Portuguese greetings tend to be more casual and warm overall, and PortuguesePod101 notes that Brazilians tend to be outgoing in their social interactions. In practice, a relaxed oi and a friendly follow-up question suit Brazil. In Portugal, olá with a handshake in formal settings is the more conservative start.
The kiss rule has a practical consequence. Because the number of cheek kisses changes from Rio de Janeiro to São Paulo, as PortuguesePod101 also notes for Rio, the reliable approach is to say your greeting first and let the other person set the physical pattern.
Time-of-day greetings and formality
Time-based greetings are the clearest way to sound polite. Learn Portuguese describes bom dia, boa tarde and boa noite as ways to greet someone more formally, and gives the following windows:
- Bom dia covers the morning. PortuguesePod101 stresses that the phrase is used only until noon, so switch once the morning ends.
- Boa tarde covers the day from 12/13h to 19/20h. The exact switch point is flexible, which is why the source gives a range.
- Boa noite starts from 19h/20h onwards.
These phrases suit shops, offices, meetings and first contact with older or unfamiliar people. They are less suitable for a friend you see daily, where oi in Brazil or a simple olá in Portugal sounds more natural. When a situation is mixed, such as a work contact who is also friendly, bom dia followed by tudo bem is a reasonable blend of polite and warm.
Casual and slang greetings
Casual greetings are where the Brazilian and European habits contrast most, and where misuse is most noticeable.
Tudo bem
Tudo bem is a two-in-one expression, used to both ask and answer “How are you?”, as PortuguesePod101 explains. That makes it the easiest casual phrase for a learner: you can ask it, then repeat it as your reply. Learn Portuguese notes that, unlike the slangier expressions, you can use it with your family as well.
E aí and olá pá
E aí is Brazilian slang for “what’s up?”. Migaku advises using it with friends only and never in professional settings. Olá pá follows a similar rule: Learn Portuguese says not to use it with anyone who is not your friend, or with a stranger. If you are the one learning, treat both as phrases to understand before you use them, and begin using them only after the other person does.
Pronunciation guide
Pronunciation is the second reason greetings differ between countries. These are the points to practise, drawn from the guides above.
- Olá: stress the final syllable, “oh-LAH”. Both Learn Portuguese and Migaku give the stress on the second syllable.
- Tudo bem: Brazilians say “TOO-doo bang”, while Portuguese speakers say “TOO-doo beng”.
- Dia in bom dia: Brazilians say “jee-ah”, while European Portuguese speakers say “dee-ah”.
Stress is the most useful habit to fix first. Placing it on the end of olá gives you a clear greeting in either country. Add the regional vowel and consonant sounds after that, once you have heard native speakers from the place you are visiting.
A short practice routine
- Choose a country. Use oi for Brazil or olá for Portugal, and stay with it for a week.
- Attach the time of day. Practise bom dia, boa tarde and boa noite in the windows given above.
- Add tudo bem. Say it as a question and then as an answer, using the vowel of your chosen variety.
- Save slang for later. Recognise e aí and olá pá, but wait for a friend to use them first.
If you are comparing languages, the same first-contact choices appear in How To Say Hello In Spanish: Simple Phrases, Politeness Tips, And Pronunciation (2026 Guide) – Slanguagestudio and in How To Say Hello In Japanese: A Practical Guide For English Speakers (2026) – Slanguagestudio.
Frequently asked questions
| Question | Answer |
|---|---|
| Is como vai formal or informal? | It is neutral, working in both formal and informal situations, according to Migaku. Learn Portuguese notes it literally translates to “How are you going?”. |
| What does viva mean as a greeting? | Viva literally means “live” but works as a greeting, per Learn Portuguese. It shows up in Portugal more than in Brazil. |
| Does Portuguese have separate greetings for evening and night? | No. Migaku notes that Portuguese does not separate evening and night the way English does, so boa noite covers both. |
| Can tudo bem be my only casual greeting? | Yes for a beginner. It both asks and answers “How are you?” and is usable with family, so it covers most casual moments until you are ready for slang. |
