I Want
A more polite version, meaning 'I would like'. Use this in restaurants, stores, and with people you don't know well.
An even more polite and slightly formal way to say 'I would like'. Excellent for showing respect in any service situation.
Use this for 'I need', when something is a necessity, not just a desire. For example, 'I need help' or 'I need a doctor'.
A casual and common way to ask for something, meaning 'Can you give me...?'. Use with friends or in informal settings like a market.
I want a coffee with milk, please.
I would like to reserve a table for two people.
I would like a round-trip ticket to Medellín.
I need to go to the bathroom. Where is it?
Mom, I want more juice.
The main difference across the Spanish-speaking world is not the word itself, but the level of politeness expected. Using 'Quiero' can be perceived as too direct or even rude in service situations.
In stores and restaurants, it's much more common and polite to use 'Me gustaría', 'Quisiera', or to phrase it as a question like '¿Me puede dar un taco?' (Can you give me a taco?).
Politeness is very important. 'Quisiera' and 'Me gustaría' are strongly preferred over 'Quiero' when speaking to strangers or in formal settings. You will also hear 'regalar' used, as in '¿Me regala un café?' which literally means 'Will you gift me a coffee?' but is understood as a very polite 'Can I have a coffee?'.
While 'Quiero' is the same, when asking someone else what they want, Argentinians use 'vos' instead of 'tú', so they say '¿Qué querés?' instead of '¿Qué quieres?'.
'Quiero' can sound a bit blunt. It's common to use 'Quería...' (the imperfect tense) to soften a request, similar to 'I was wanting...'. For example, 'Quería un café'.
Overusing 'Quiero' in polite situations. — Directly translating 'I want' to 'Quiero' can sound demanding, especially in a restaurant or store. It's better to use a softer alternative. Instead of '¡Quiero un taco!', say 'Me gustaría un taco, por favor.'.
Incorrect conjugation of the verb 'querer'. — 'Querer' is an irregular verb. A common beginner mistake is to say 'Yo quere'. The correct form for 'I' is 'quiero'. WRONG: 'Yo quere agua.' CORRECT: 'Yo quiero agua.'
Confusing 'querer' (to want) with 'gustar' (to like). — To say you like something, you use 'Me gusta'. To say you want something, you use 'Quiero'. 'Me gusta el café' means 'I like coffee' (in general). 'Quiero un café' means 'I want a coffee' (right now).