How about this vs Why not

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

How about this

Top 1,000 (very common)

Why not

InformalTop 2,000 (common)
Most formal: How about thisMost common: How about this
 How about thisWhy not
Pronunciation🇬🇧 //haʊ əˈbaʊt ðɪs//🇺🇸 //haʊ əˈbaʊt ðɪs//🇬🇧 //waɪ nɒt//🇺🇸 //waɪ nɑt//
MeaningA way to suggest or propose something.A suggestion to consider an idea or action.
ExampleHow about this restaurant for dinner?You should try the new restaurant; why not?
RegisterNeutralInformal
How commonTop 1,000 (very common)Top 2,000 (common)
Collocationshow about this idea, how about this alternative, how about this optionsuggest trying, consider doing, encouragement to
Common mistakesUsed inappropriately in very formal contexts., Confused with suggestions that require strong persuasion., Omitting the context may lead to confusion about the suggestion.Misusing in formal contexts where other phrases are more appropriate., Confusing with 'why not?' as a question instead of a suggestion.
Usage notesCommonly used to suggest ideas or options. More casual; not typically used in very formal situations.Commonly used in casual conversations to encourage someone to try or consider something. Avoid in formal situations.

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How about this
Why not

Frequently asked questions: How about this vs Why not

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

How about this: A way to suggest or propose something. Why not: A suggestion to consider an idea or action.

Which is more formal: How about this and Why not?

How about this is the most formal of these.

Which is more common: How about this and Why not?

How about this is the most common in everyday English.

Can you show an example of each?

How about this: How about this restaurant for dinner? Why not: You should try the new restaurant; why not?

Can I use How about this and Why not interchangeably?

Not always. How about this 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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