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 someone know about something
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "let someone know about something" is correct and usable in written English.
It can be used when you want to inform someone about a specific piece of information or update them on a matter. Example: "Please let me know about the meeting time as soon as you have it."
✓ Grammatically correct
News & Media
Wiki
Academia
Alternative expressions(11)
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Human-verified similar examples from authoritative sources
Similar Expressions
60 human-written examples
Let someone know about the predicament so it won't happen in the future?
News & Media
When I asked if he'd let someone know about me, to contact me, he reacted in mock horror.
News & Media
This is not the day to "finally" let someone know what you think about him/her.
Wiki
Do you want your playlist to let someone know how you feel about him or her?
Wiki
"If [students are] going through something, they need to let someone know," he said.
News & Media
Let someone know where you are.
News & Media
Let someone know.
News & Media
Let someone know where you're headed.
Wiki
Plus it lets someone know quickly about a possible threat.
News & Media
Let people know about something good someone else did.
Wiki
Let someone else know about your goals.
Wiki
Expert writing Tips
Best practice
When using "let someone know about something", ensure the context clearly indicates what action you expect the person to take after receiving the information. This avoids ambiguity and promotes efficient communication.
Common error
While acceptable, "let someone know about something" can sound informal in professional settings. Opt for alternatives like "inform" or "notify" to maintain a more polished tone.
Source & Trust
76%
Authority and reliability
4.1/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "let someone know about something" functions as a request or instruction to communicate information. Ludwig AI confirms its usability in written English.
Frequent in
News & Media
33%
Wiki
33%
Academia
33%
Less common in
Science
0%
Formal & Business
0%
Encyclopedias
0%
Ludwig's WRAP-UP
In summary, "let someone know about something" is a grammatically correct phrase used to instruct or request someone to communicate information. Ludwig AI verifies that it's usable, though it can be seen as informal. While versatile, consider using more formal alternatives like "inform" or "notify" in professional contexts. Common contexts include news media, wikis and academic settings. When using the phrase, ensure clarity about the expected action after receiving the information.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
inform someone about something
Replaces "let know" with the more formal "inform", altering the tone slightly.
notify someone about something
Uses "notify" instead of "let know", suggesting a more official or important communication.
tell someone about something
Employs the simpler verb "tell", making the phrase more direct and informal.
make someone aware of something
Focuses on creating awareness rather than just conveying information.
apprise someone of something
Uses the more formal and less common verb "apprise", increasing the formality.
update someone on something
Specifies that the information is new or a progress report.
keep someone informed about something
Implies a continuous flow of information rather than a one-time notification.
give someone details about something
Highlights the provision of specific details.
communicate something to someone
Focuses on the act of communication, which could be more general than just informing.
pass on information about something
Suggests relaying information that was received from someone else.
FAQs
What can I say instead of "let someone know about something"?
You can use alternatives like "inform someone about something", "notify someone about something", or "tell someone about something" depending on the context.
Is "let someone know about something" too informal for professional emails?
While generally acceptable, it can be perceived as informal. For a more professional tone, consider using phrases like "please be advised" or "I would like to inform you".
How do I use "let someone know about something" in a sentence?
It is typically used to request someone to inform you of something. For example, "Please let me know about the changes" or "Let the manager know about the incident".
What's the difference between "let someone know" and "inform someone"?
"Inform someone" is more formal and direct, while "let someone know" is more casual. Both convey the same basic meaning, but the choice depends on the context and the desired tone.
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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
76%
Authority and reliability
4.1/5
Expert rating
Real-world application tested