Calm down vs Slow it down

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

Calm down

Top 1,000 (very common)

Slow it down

Top 1,000 (very common)
 Calm downSlow it down
Pronunciation🇬🇧 //kɑːm daʊn//🇺🇸 //kɑm daʊn//🇬🇧 //sləʊ ɪt daʊn//🇺🇸 //sloʊ ɪt daʊn//
MeaningTo relax or stop being upset.Make something go slower.
ExampleYou need to calm down before we continue this discussion.Can you please slow it down? I can't keep up.
RegisterNeutralNeutral
How commonTop 1,000 (very common)Top 1,000 (very common)
Collocationscalm down the situation, calm down emotions, calm down quicklyslow it down for clarity, slow it down when speaking, slow it down in traffic
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.Using it in a formal situation when a more specific term is better., Incorrectly using 'slow it down' with inanimate objects that cannot be slowed., Confusing with 'take it easy', which has a different meaning.
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.Used in both casual and professional contexts. Appropriate when requesting a reduction in pace, often in discussions or presentations.

See it in real clips

Calm down
Slow it down

Frequently asked questions: Calm down vs Slow it down

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

Calm down: To relax or stop being upset. Slow it down: Make something go slower.

Can you show an example of each?

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

Can I use Calm down and Slow it down interchangeably?

Not always. Calm down and Slow it down 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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