Estou cansado.

This phrase is super versatile. You can use it when you wake up feeling groggy, after a long commute, or when you've been working non-stop. It's perfect for telling friends you can't hang out, or for letting your boss know you need a breather (with the right tone, of course!). You can even say it after watching a really intense movie – your brain might just be tired!

'Estou cansado' is pretty neutral. You can use it with friends, family, and even in most work settings. For a more formal situation, you might add context or use a slightly different phrasing, but the core phrase is widely accepted. It's like your comfy, everyday jeans – they fit almost anywhere. Just avoid using it with your new boss on the first day unless you're also smiling and explaining why!

Imagine you're scrolling through Instagram and see a friend posted about a huge party last night. You might comment, 'Nossa, não fui porque estou cansado.' Or maybe you're on a video call with your team, and you say, 'Desculpem, preciso encerrar. Estou cansado e preciso descansar.' It's that simple! You can also use it when ordering food: 'Um café, por favor. Estou cansado.'

Use 'Estou cansado' when you genuinely feel tired, whether it's physically, mentally, or emotionally. After a long day of sightseeing? 'Estou cansado.' Finished a marathon gaming session? 'Estou cansado.' Feeling drained after a difficult conversation? 'Estou cansado.' It’s your honest report on your energy levels. It’s also great for setting boundaries, like letting people know you need some downtime. It's like saying 'My social battery is at 1%!'

Avoid using 'Estou cansado' if you're trying to impress someone with your boundless energy, like in a job interview where they ask about your work ethic. It’s also not ideal if you’re trying to sound super enthusiastic about a new, exciting opportunity. You wouldn't tell your date you're tired on the first meeting unless you really, *really* need to go home! Save it for when you mean it, and when it fits the social context. It’s not the phrase for 'I'm bored' either; that’s a different vibe.

Sometimes learners mix up 'cansado' (tired) with 'cansaço' (tiredness, fatigue). So, instead of 'Estou cansado,' they might say 'Tenho cansaço,' which sounds a bit clunky. Another common slip is using the wrong gender. If you're female, you need to adjust the adjective! ✗ 'Estou cansado' (male) → ✓ 'Estou cansada' (female). It's a small detail that makes a big difference. Also, don't say 'Eu sou cansado' – that implies you are *always* a tired person, which is a bit dramatic!

In Brazil, you might hear 'Tô cansado' – 'Tô' is a super common contraction of 'Estou,' making it very informal and quick. In Portugal, 'Estou exausto' (I'm exhausted) is a stronger version. For a more casual vibe, especially among younger people, you might hear 'Morri' (I died), implying extreme tiredness. If you want to be slightly more formal or emphasize mental fatigue, you could say 'Estou esgotado' (I'm drained/worn out).