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
Let me know which
Grammar usage guide and real-world examplesUSAGE SUMMARY
"Let me know which" is correct and usable in written English.
You can use it when you need someone to inform you of the specific details of their decision or choice. For example: "Let me know which day you decide to come over for dinner."
✓ Grammatically correct
News & Media
Academia
Alternative expressions(20)
Let me know your choice
Please inform me which
Tell me your preference
Specify which option
Let me know when
letting me know which
keep me posted which
Let me ask which
Let me decide which
Let me go which
Let me drink which
Let me wander which
Let me pick which
Let me Go which
Let me Die which
Let me begin which
Let me sleep which
Let me Finish which
Let me guess which
Let me understand the
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
27 human-written examples
Let me know which fabric shop you really recommend.
News & Media
Let me know which shows you manage to get along to.
News & Media
Let me know which ones you think are right or wrongheaded and share your own in the comments section.
News & Media
Let me know which ones and why.
News & Media
Let me know which new features you like most and which changes you find most disappointing in the comments section.
News & Media
Let me know which one you prefer -- or, if you think you can do better, add a new suggestion of your own.
News & Media
Human-verified similar examples from authoritative sources
Similar Expressions
33 human-written examples
Hello would you mind letting me know which hosting company you're utilizing?
Academia
The app also had an updated "Service Advisories" feature, letting me know which stops might be closed.
News & Media
But it's still another pseudo-social network that I'll have to keep tabs on – I'd much rather get a weekly digest in my inbox letting me know which events are coming up rather than have to keep revisiting the site.
News & Media
Leave a comment below letting me know which of the 10 steps to success you'll be working on this year.
News & Media
And I thank my young colleagues for sorting through the clutter and letting me know which ones will really make my life easier.
News & Media
Expert writing Tips
Best practice
When using "Let me know which", ensure the context provides clear options for the person to choose from. For example, "Here are the three designs; let me know which one you prefer."
Common error
Avoid using "Let me know which" without providing the options or criteria to choose from. Instead of saying, "Let me know which," provide context: "Here are the options, let me know which you like."
Source & Trust
89%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "Let me know which" functions as an imperative request, prompting the listener to provide information about a specific choice or preference. Ludwig confirms its usability in written English.
Frequent in
News & Media
60%
Academia
30%
Formal & Business
10%
Less common in
Science
0%
Encyclopedias
0%
Reference
0%
Ludwig's WRAP-UP
The phrase "Let me know which" is a common and grammatically correct way to ask someone to inform you of their choice or preference. As Ludwig highlights, it's usable in various contexts, primarily within news and media, academia, and formal business settings. To ensure clarity, always provide context or options when using this phrase. While it holds a neutral to slightly informal tone, you can adapt it to more formal situations by using alternatives such as "Please inform me which". By considering both best practices and common errors, you can effectively employ "Let me know which" in your communication.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
Let me know your choice
Focuses on the selection or decision made.
Indicate which one
Directs the person to point out or specify their choice.
Please inform me which
More formal way of asking for information.
Tell me your preference
Specifically asks about the preferred option.
Specify which option
Asks for a specific option to be identified.
Inform me of your selection
Formal way of requesting notification of a selection.
Kindly tell me which
Polite and slightly more formal request for information.
Share your thoughts on which
Invites the person to express their opinion or reasoning.
Advise me as to which
Very formal and professional way to ask for guidance or information.
Enlighten me on which
Humorous way of requesting information with a hint of needing clarification.
FAQs
How can I rephrase "Let me know which" in a formal setting?
In a formal setting, consider using phrases like "Please inform me which", "Kindly advise me as to which", or "Inform me of your selection".
What's a more casual way to say "Let me know which"?
For a casual tone, you could say "Tell me which one" or "Let me know your choice".
Is it correct to use "Let me know which" at the beginning of a sentence?
Yes, it is perfectly acceptable to start a sentence with "Let me know which". For example, "Let me know which option works best for you."
What is the difference between "Let me know which" and /s/tell+me+which?
While both phrases solicit information, "Let me know which" is generally perceived as slightly more polite than simply "Tell me which".
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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
89%
Authority and reliability
4.5/5
Expert rating
Real-world application tested