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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
which is used for
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "which is used for" is correct and usable in written English.
You can use it when you are describing the purpose of something. For example, "This device is a multi-tool, which is used for cutting, drilling, and hammering."
✓ Grammatically correct
News & Media
Science
Academia
Encyclopedias
Wiki
Alternative expressions(20)
that serves as
that functions as
which serves to
that is designed for
that facilitates
which is useful for
which helps for
whom of which
that opens the door to
that leads to
that creates an opportunity for
that enables
that contributes to
which allows for
held potential for
that aids
could result in
carry potential for
that participates
hold promise for
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
53 human-written examples
That water which is used for agriculture is often contaminated.
News & Media
A pitchfork, which is used for pitching hay, has no more than three tines.
News & Media
Demand for metallurgical coal — which is used for making steel — has roared back in recent months.
News & Media
Cobra stands for Cabinet Office briefing room A, which is used for crisis meetings.
News & Media
The mould, which is used for manufacturing the object, weighs 20 tonnes.
News & Media
Theobald and his family raise waxy corn, which is used for cornstarch and other thickeners.
News & Media
The vacuum chamber had a view port above the sample which is used for sample illumination.
Science & Research
Human-verified similar examples from authoritative sources
Similar Expressions
4 human-written examples
The package contained Iridium-172, which is used for industrial radiography.
News & Media
It's like Bluetooth, which is used for headsets, but Wibree uses less power.
News & Media
The matrix format is rather an exception, which is used, for instance, in consumer reports.
Science
Twitter, which is used for sending very short updates and thoughts about your life.
Wiki
Expert writing Tips
Best practice
Use "which is used for" to clearly define the purpose or function of a noun within a relative clause. Ensure the clause adds essential information to the sentence.
Common error
Avoid using "which" when "that" is more appropriate for restrictive clauses (clauses essential to the meaning of the sentence). "Which" generally introduces non-restrictive clauses, which add extra but non-essential information and are set off by commas.
Source & Trust
83%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "which is used for" functions as a relative clause introducing additional information about a noun. As Ludwig AI confirms, it's grammatically correct. Examples in Ludwig show it defining the purpose or function of various subjects.
Frequent in
News & Media
36%
Science
29%
Academia
14%
Less common in
Encyclopedias
5%
Wiki
5%
Formal & Business
2%
Ludwig's WRAP-UP
In summary, the phrase "which is used for" is a grammatically sound and common relative clause used to describe the purpose or function of a noun. Ludwig AI confirms its correctness and wide applicability. It appears frequently in news, scientific, and academic writing, maintaining a neutral tone. To vary your writing, consider alternatives like "that serves as" or "that is designed for". However, be aware of the difference between "which" and "that" to avoid grammatical errors.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
that is employed for
Replaces "which" with "that" and "used" with "employed", maintaining a formal tone.
that serves as
Substitutes "is used for" with "serves as", focusing on the function or purpose.
that functions as
Similar to "serves as", but emphasizes the action or operation performed.
which serves to
Replaces "is used for" with "serves to", highlighting the intended outcome.
that is designed for
Focuses on the intentional design or purpose of something.
that is intended for
Similar to "designed for", but emphasizes the intended use or application.
which is suitable for
Highlights the appropriateness or fitness for a particular purpose.
that is appropriate for
Synonymous with "suitable for", emphasizing the fitness for a purpose.
that is applied to
Focuses on the application or use in a specific context.
that facilitates
Highlights the enabling or assisting role of something.
FAQs
How can I use "which is used for" in a sentence?
You can use "which is used for" to specify the purpose of something in a nonrestrictive clause, like "The laboratory, "which is used for" conducting experiments, is equipped with advanced instruments."
What is a good alternative to "which is used for"?
Depending on the context, you could use phrases like "that serves as", "that functions as", or "that is designed for" as alternatives to "which is used for".
What's the difference between "which is used for" and "that is used for"?
"Which is used for" typically introduces a nonrestrictive clause, providing additional information. "That is used for" introduces a restrictive clause, essential for defining the noun. For example, "The tool that is used for cutting metal is sharp" versus "The tool, "which is used for" delicate work, is kept separately."
Is it correct to start a sentence with "which is used for"?
No, "which is used for" is a relative clause and cannot start a sentence. It must follow a noun it modifies.
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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
83%
Authority and reliability
4.5/5
Expert rating
Real-world application tested