Used and loved by millions
Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.

Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com
what for
Grammar usage guide and real-world examplesUSAGE SUMMARY
"what for" is correct and usable in written English.
You can use it to ask the reason why something was or will be done. For example: "What for did they close the store?".
✓ Grammatically correct
News & Media
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Human-verified examples from authoritative sources
Exact Expressions
60 human-written examples
What for?
News & Media
"What for?" Rivera asked.
News & Media
What for, I asked.
News & Media
What for?' " she said.
News & Media
What for: Funniness.
News & Media
What for Seniors.
News & Media
And what for?
News & Media
I said yes, what for?
News & Media
"What for?" "Just to take.
News & Media
"What for?" the judge inquired.
News & Media
Magic minerals Calcium What for?
News & Media
Expert writing Tips
Best practice
Use "what for" to directly question the reason or purpose behind an action, especially when you are surprised or skeptical. For example, if someone says they are buying ten loaves of bread, you might ask, "What for?"
Common error
While "what for" is acceptable in informal conversation, it can sound abrupt or impolite in more formal settings. Instead, opt for phrases like "for what reason" or "what is the purpose" to maintain a professional tone.
Source & Trust
92%
Authority and reliability
4.6/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "what for" functions as an interrogative adverbial, questioning the purpose, reason, or cause of an action or statement. It seeks clarification or justification, as seen in Ludwig examples where it's used to challenge or inquire about intentions.
Frequent in
News & Media
75%
Science
10%
Formal & Business
5%
Less common in
Encyclopedias
3%
Wiki
1%
Reference
1%
Ludwig's WRAP-UP
In summary, the phrase "what for" is a common and grammatically correct way to ask about the reason or purpose behind something, as confirmed by Ludwig AI. While it is most frequently found in news and media, it is generally considered informal and neutral, making it suitable for everyday conversations. However, it's advisable to use more formal alternatives such as "for what reason" in professional or academic settings. Be mindful of the context to ensure your language remains appropriate and effective. Remember that "what for" serves to elicit explanation and can express surprise or skepticism.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
why
A direct and concise question about the reason.
for what reason
More formal and explicit way of asking 'why'.
what's the purpose
Focuses on the intended aim or goal.
to what end
A more philosophical and probing inquiry.
what is the point
Questions the value or relevance of something.
what's the objective
Emphasizes the specific goal to be achieved.
what is the intention
Focuses on the motive behind an action.
on what account
Formal and somewhat archaic way of asking 'why'.
what's the rationale
Asks for the underlying logic or justification.
what's the justification
Seeks a reason to defend or support an action.
FAQs
How can I use "what for" in a sentence?
You can use "what for" to directly ask about the purpose or reason for something. For example, "I'm going to the store." "What for?"
What's a more formal way to say "what for"?
In more formal situations, you can use phrases like "for what reason" or "what is the purpose".
Is "what for" grammatically correct?
Yes, "what for" is grammatically correct in informal contexts. Ludwig AI confirms that it is usable in written English.
When is it appropriate to use "what for"?
"What for" is appropriate in informal conversations when you want a quick and direct explanation for something.
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Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Source & Trust
92%
Authority and reliability
4.6/5
Expert rating
Real-world application tested