Calm down vs Slow it down some

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

Calm down

Top 1,000 (very common)

Slow it down some

InformalTop 5,000 (fairly common)
Most formal: Calm downMost common: Calm down
 Calm downSlow it down some
Pronunciation🇬🇧 //kɑːm daʊn//🇺🇸 //kɑm daʊn//🇬🇧 //sləʊ ɪt daʊn sʌm//🇺🇸 //sloʊ ɪt daʊn sʌm//
MeaningTo relax or stop being upset.Make something less fast.
ExampleYou need to calm down before we continue this discussion.Can you please slow it down some? I can't keep up with you.
RegisterNeutralInformal
How commonTop 1,000 (very common)Top 5,000 (fairly common)
Collocationscalm down the situation, calm down emotions, calm down quicklyslow it down, slow it down a bit, slow it down some more
Antonymsagitate, excite, disturb-
Common mistakes'Calm down' can be used for things instead of people, which is incorrect., Confusing 'calm down' with 'cool off', which has a slightly different meaning., Using 'calm down' too aggressively can make someone feel worse.Confused with 'slow down' which is more commonly used., Using in formal contexts where a more polite phrase is necessary., Inverting the phrase structure, saying 'it down some slow.'
Usage notesUse in situations where someone is anxious or angry. It’s neutral in tone, appropriate for friends, family, or colleagues, but can seem dismissive if not delivered carefully.Use this expression when advising someone to decrease their speed, whether in speech or action. It’s casual and fits conversational contexts.

See it in real clips

Calm down
Slow it down some

Frequently asked questions: Calm down vs Slow it down some

What's the difference between Calm down and Slow it down some?

Calm down: To relax or stop being upset. Slow it down some: Make something less fast.

Which is more formal: Calm down and Slow it down some?

Calm down is the most formal of these.

Which is more common: Calm down and Slow it down some?

Calm down is the most common in everyday English.

Can you show an example of each?

Calm down: You need to calm down before we continue this discussion. Slow it down some: Can you please slow it down some? I can't keep up with you.

Can I use Calm down and Slow it down some interchangeably?

Not always. Calm down and Slow it down some 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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