How's about vs Why not

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

How's about

InformalBeyond 10,000 (less common)

Why not

InformalTop 2,000 (common)
Most common: Why not
 How's aboutWhy not
Pronunciation🇬🇧 //haʊz əˈbaʊt//🇺🇸 //haʊz əˈbaʊt//🇬🇧 //waɪ nɒt//🇺🇸 //waɪ nɑt//
MeaningWhat do you think about this?A suggestion to consider an idea or action.
ExampleHow's about we go for a hike this weekend?You should try the new restaurant; why not?
RegisterInformalInformal
How commonBeyond 10,000 (less common)Top 2,000 (common)
Collocationshow's about dinner, how's about a visit, how's about a breaksuggest trying, consider doing, encouragement to
Common mistakesUsed in formal situations where 'how about' would be appropriate., Confused with other phrases like 'how about that'., Adding unnecessary words like 'how's about that'.Misusing in formal contexts where other phrases are more appropriate., Confusing with 'why not?' as a question instead of a suggestion.
Usage notesUsed in casual conversations to propose or suggest an idea, often in friendly contexts. Avoid in formal settings.Commonly used in casual conversations to encourage someone to try or consider something. Avoid in formal situations.

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How's about
Why not

Frequently asked questions: How's about vs Why not

What's the difference between How's about and Why not?

How's about: What do you think about this? Why not: A suggestion to consider an idea or action.

Which is more common: How's about and Why not?

Why not is the most common in everyday English.

Can you show an example of each?

How's about: How's about we go for a hike this weekend? Why not: You should try the new restaurant; why not?

Can I use How's about and Why not interchangeably?

Not always. How's about and Why not 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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