Chill out vs Don't worry about that

When to use each in English, with meaning, register, and examples.

Chill out

InformalTop 2,000 (common)

Don't worry about that

Beyond 10,000 (less common)
Most formal: Don't worry about thatMost common: Chill out
 Chill outDon't worry about that
Pronunciation🇬🇧 //tʃɪl aʊt//🇺🇸 //tʃɪl aʊt//🇬🇧 //dəʊnt ˈwʌri əˈbaʊt ðæt//🇺🇸 //doʊnt ˈwɜri əˈbaʊt ðæt//
MeaningCalm down and relax.Don't be concerned about that.
ExampleYou need to chill out and stop worrying so much about the exam.Don't worry about that; everything will be fine.
RegisterInformalNeutral
How commonTop 2,000 (common)Beyond 10,000 (less common)
Collocationschill out time, chill out period, chill out zoneworry about something, don't worry, stop worrying, worry too much
Common mistakes'Chill out' is often confused with 'cool off', but the meanings can slightly differ., Some learners use 'chill out' in a serious context, which may sound inappropriate., Using 'chill out' as a command can come off as rude.Using 'worry' with a subject (e.g., 'Don't you worry about that')., Confusing with 'Don't worry for that'., Overusing in formal emails where 'Please don't concern yourself' might be better.
Usage notesUse 'chill out' in casual conversations to suggest someone should relax. Avoid in formal contexts.Commonly used to reassure someone. Suitable for both casual and formal contexts but may be too informal for very serious situations.

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Chill out
Don't worry about that

Frequently asked questions: Chill out vs Don't worry about that

What's the difference between Chill out and Don't worry about that?

Chill out: Calm down and relax. Don't worry about that: Don't be concerned about that.

Which is more formal: Chill out and Don't worry about that?

Don't worry about that is the most formal of these.

Which is more common: Chill out and Don't worry about that?

Chill out is the most common in everyday English.

Can you show an example of each?

Chill out: You need to chill out and stop worrying so much about the exam. Don't worry about that: Don't worry about that; everything will be fine.

Can I use Chill out and Don't worry about that interchangeably?

Not always. Chill out and Don't worry about that are related and overlap in some contexts, but they differ in register, how common they are, and usage, so swapping one for another can change the meaning or tone. Check the differences above before substituting.

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