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 that
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase 'let me know that' is correct and usable in written English.
It is often used to politely ask someone to inform you of something. For example, you might say "If you hear anything about the job opening, let me know that."
✓ Grammatically correct
News & Media
Academia
Alternative expressions(20)
let me repeat that
let me Google that
let me modify that
let me scratch that
let me acknowledge that
Told me that
alerted me to the idea that
let me emphasize that
explained me that
let me see that
let me know when
let me fill that
alerted me to the fact that
let me amend that
Mentioned to me that
enlightened me that
let me get that
alerted me to the photograph that
advise me that
tell me that
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
They kind of let me know that.
News & Media
But the Neilsons let me know that wasn't going to happen.
News & Media
And to let me know that he'd changed his mind.
News & Media
He let me know that Plascencia's deliberate presentation is a little fussy for his taste.
News & Media
Is he forwarding messages to include me, or to let me know that he'll be busy?
News & Media
He quickly let me know that he was unmoved by the demands of the Kurds.
News & Media
But he also let me know that it was an excellent way of getting laid.
News & Media
Solzhenitsyn let me know that my visit was drawing to a close.
News & Media
Please send me email and let me know that you got svm-light.
Academia
He let me know that if I left school, I wouldn't receive any financial support.
News & Media
He let me know that women were allowed to take up aerospace.
News & Media
Expert writing Tips
Best practice
Use "let me know that" when you need someone to confirm their awareness or understanding of something you've communicated.
Common error
In formal contexts, phrases like "inform me that" or "notify me that" often sound more professional than "let me know that". Consider your audience and the level of formality required.
Source & Trust
88%
Authority and reliability
4.6/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "let me know that" primarily functions as a request for confirmation or notification. It seeks to ensure the speaker is informed about a particular fact or situation. As Ludwig AI confirms, it is a standard English expression.
Frequent in
News & Media
69%
Academia
19%
Science
4%
Less common in
Formal & Business
3%
Encyclopedias
0%
Wiki
0%
Ludwig's WRAP-UP
In summary, the phrase "let me know that" is a common and grammatically correct way to request information or confirmation. Ludwig AI validates this with numerous examples from diverse sources. While generally neutral in tone, it can be replaced with more formal alternatives like "inform me that" in professional or academic contexts. Its primary function is to ensure the speaker is updated about a specific piece of information, reflecting its wide applicability across various communication scenarios.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
tell me that
More direct and informal alternative.
inform me that
More formal alternative; suitable for professional communication.
notify me that
Suitable when emphasizing an official or important announcement.
advise me that
Implies seeking guidance or counsel.
make sure to tell me that
Emphasizes the importance of receiving the information.
keep me updated that
Focuses on receiving ongoing information about a situation.
be sure to inform me that
Similar to 'make sure', but more formal.
let me be aware that
Highlights being informed about a situation or fact.
communicate that to me
A more roundabout and slightly formal way of requesting information.
bring it to my attention that
Formal and indirect; often used when the information might be overlooked.
FAQs
How can I rephrase "let me know that" to sound more formal?
You can use phrases like "inform me that", "notify me that", or "advise me that" depending on the specific context.
Is "let me know that" suitable for professional emails?
Yes, "let me know that" is generally acceptable for professional emails, but for very formal communication, consider using "inform me that" or another more formal alternative.
What's a more direct way to say "let me know that"?
A more direct way to say "let me know that" is simply "tell me that".
When should I use "let me know that" vs. "let me know when"?
"Let me know that" is used to confirm understanding or awareness of a fact, while "let me know when" is used to ask about the timing of an event. For example, "Let me know that you received the document" vs. "Let me know when you are available".
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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
88%
Authority and reliability
4.6/5
Expert rating
Real-world application tested