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
I let him know
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "I let him know" is correct and usable in written English.
You can use it when you want to express that you informed someone about something. Example: "After the meeting, I let him know about the changes in the project timeline."
✓ Grammatically correct
News & Media
Science
Alternative expressions(6)
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
51 human-written examples
"And I let him know it".
News & Media
"I let him know it hurt," Giambi said.
News & Media
"I let him know my support for him," Coughlin said.
News & Media
"And I assure you that I let him know it".
News & Media
How can I let him know to step back?
News & Media
I let him know, man, you're nuts, but for a bobsledder that's almost a compliment.
News & Media
Human-verified similar examples from authoritative sources
Similar Expressions
7 human-written examples
And I promised him I'd let him know on Saturday if I was interested in being in the process.
News & Media
I only wish I'd let him know that before he died.
News & Media
If he checked anything else I'd let him know I was aware of his pain and would get to him ASAP.
News & Media
I definitely let him know what I think, and he knows how I feel about it all.
News & Media
I've let him know that I will have a variety for him to store/process.
News & Media
Expert writing Tips
Best practice
Use "I let him know" in situations where you want to emphasize the act of informing someone directly and personally.
Common error
While "I let him know" is generally acceptable, consider using more formal alternatives like "I informed him" or "I notified him" in professional or academic writing.
Source & Trust
87%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "I let him know" primarily functions as a declarative statement. It conveys that the speaker has performed the action of informing someone about something. As Ludwig AI confirms, it's a correct and usable phrase.
Frequent in
News & Media
77%
Science
23%
Formal & Business
0%
Less common in
Academia
0%
Encyclopedias
0%
Wiki
0%
Ludwig's WRAP-UP
In summary, the phrase "I let him know" is a grammatically sound and widely used expression for conveying that you informed someone of something. Ludwig AI confirms its correctness and usability. It is prevalent across various contexts, particularly in news and media, demonstrating its versatility. While it holds a neutral tone, more formal alternatives such as "I informed him" may be preferred in certain professional settings. Remember to consider the context and audience when choosing between this phrase and its many synonyms.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
I informed him
Replaces "let him know" with a more formal and direct verb.
I told him
A simpler and more common alternative to "I let him know".
I notified him
Offers a slightly more formal tone than "I told him".
I made him aware
Focuses on ensuring the person understood the information.
I communicated to him
Highlights the act of conveying information.
I advised him
Suggests offering guidance or a recommendation.
I apprised him of the situation
More formal and emphasizes providing comprehensive information.
I conveyed to him
Emphasizes the transmission of a message or feeling.
I shared with him
Highlights the act of sharing information or experiences.
I acquainted him with the facts
Focuses on making someone familiar with specific details.
FAQs
What can I say instead of "I let him know"?
You can use alternatives like "I informed him", "I told him", or "I notified him" depending on the context.
How to use "I let him know" in a sentence?
You can use "I let him know" to express that you informed someone about something. For example, "I let him know about the meeting time change."
Which is correct, "I let him know" or "I have let him know"?
"I let him know" is in the simple past tense and is suitable for describing a completed action. "I have let him know" is in the present perfect tense and suggests the action has relevance to the present. Both are correct, but the best choice depends on the specific context.
What's the difference between "I let him know" and "I told him"?
While similar, "I told him" is a more direct and general statement. "I let him know" can imply a more specific or gentle delivery of information. In many cases, they are interchangeable.
Editing plus AI, all in one place.
Stop switching between tools. Your AI writing partner for everything—polishing proposals, crafting emails, finding the right tone.
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Source & Trust
87%
Authority and reliability
4.5/5
Expert rating
Real-world application tested