That's unusual vs Unexpected

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

That's unusual

Top 2,000 (common)

Unexpected

Top 2,000 (common)B2adjective
 That's unusualUnexpected
Pronunciation🇬🇧 //ðæts ʌnˈjuːʒəl//🇺🇸 //ðæts ʌnˈjuːʒəl//🇬🇧 /["/ˌʌnɪkˈspektɪd/"]/🇺🇸 /["/ˌʌnɪkˈspektɪd/"]/
MeaningThat's not normal or expected.Something that happens suddenly and is not planned.
ExampleI saw a cat wearing a hat, and that's unusual.The unexpected turn of events left everyone in shock.
RegisterNeutralNeutral
How commonTop 2,000 (common)Top 2,000 (common)
CEFR level-B2
Part of speechadjective
Collocationsthat's unusual response, that's unusual behavior, that's unusual circumstancebe, most, very, completely
Antonymsnormal, typical, usualexpected, anticipated, predictable
Common mistakesUsing inappropriately in formal writing., Mispronouncing as 'that is unusual'., Confusing with 'that's normal' when reacting.Confusing it with 'expected'., Using it with the wrong noun (e.g., 'an unexpected result' not 'an unexpected results')., Overusing it in a context where 'surprising' may be more appropriate.
Usage notesUse in conversations to express surprise or curiosity. Suitable in both casual and formal contexts, but may sound too blunt in very formal settings.Use 'unexpected' when referring to events or outcomes that surprise someone. It can be used in both casual and formal contexts, appropriate for writing and speech. Avoid using it in overly casual contexts or when discussing planned surprises.

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That's unusual

Frequently asked questions: That's unusual vs Unexpected

What's the difference between That's unusual and Unexpected?

That's unusual: That's not normal or expected. Unexpected: Something that happens suddenly and is not planned.

Can you show an example of each?

That's unusual: I saw a cat wearing a hat, and that's unusual. Unexpected: The unexpected turn of events left everyone in shock.

Can I use That's unusual and Unexpected interchangeably?

Not always. That's unusual and Unexpected 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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