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'll find out and let you know
Grammar usage guide and real-world examplesTable 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
1 human-written examples
Experience shows that if you go back in 24-hours and respond - even if it's 'thanks, I'll find out and let you know' it's okay.
News & Media
Human-verified similar examples from authoritative sources
Similar Expressions
59 human-written examples
We'll keep digging and let you know what we find out — but in the mean time, keep your ear to the ground and let us know what you hear.
News & Media
You know I'll find out.
News & Media
When we find out, we'll let you know.
News & Media
When I find out more, I'll let you know.
News & Media
We reached out to McDonald 'sto find out and we'll let you know if we hear back.
News & Media
Find out how they will let you know if you do/don't get in.
Wiki
I'll look into it and I will let you know what I find out,'" according to the government website.
News & Media
Then find out and let them know.
News & Media
We'll find out soon, I should have a pair next week and I'll let you know.
News & Media
If he does like you, it will work itself out and he will let you know.
Wiki
Expert writing Tips
Best practice
Use "I'll find out and let you know" when you need to investigate something and promise to provide the information afterwards. This phrase sets a clear expectation for follow-up.
Common error
Avoid using "I'll find out and let you know" if you're unsure whether you can actually obtain the information. Only promise what you can realistically deliver to maintain credibility.
Source & Trust
83%
Authority and reliability
4.1/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "I'll find out and let you know" primarily functions as a promise or assurance. It indicates that the speaker will obtain information and subsequently communicate it to the listener. As per Ludwig, the phrase is grammatically correct and widely understood.
Frequent in
News & Media
45%
Wiki
25%
Formal & Business
10%
Less common in
Academia
5%
Science
5%
Social Media
5%
Ludwig's WRAP-UP
In summary, the phrase "I'll find out and let you know" is a grammatically correct and commonly used expression to assure someone that you will investigate a matter and provide them with information once you have it. It is suitable for various contexts, from informal conversations to professional settings, and is frequently found in news media and general communication. While Ludwig confirms its correctness, remember to avoid overpromising and ensure you can deliver on your assurance.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
I'll investigate and inform you
Replaces 'find out' with 'investigate' and 'let you know' with 'inform you', offering a slightly more formal tone.
I'll look into it and tell you what I discover
Substitutes 'find out' with 'look into it' and 'let you know' with 'tell you what I discover', emphasizing the process of discovery.
I'll check and update you
Uses 'check' instead of 'find out' and 'update you' for 'let you know', suggesting a brief and concise communication.
I'll get back to you with the details
Focuses on providing details after finding out, implying a more comprehensive response.
I'll research it and keep you posted
Replaces 'find out' with 'research it' and 'let you know' with 'keep you posted', indicating a more in-depth investigation and ongoing updates.
I'll see what I can find and get in touch
Emphasizes the uncertainty of finding information and promises to connect afterward.
I'll do some digging and give you the scoop
Uses 'do some digging' for 'find out' and 'give you the scoop' for 'let you know', adding an informal and journalistic flair.
I'll hunt down the answer and share it with you
Substitutes 'find out' with 'hunt down the answer' and 'let you know' with 'share it with you', highlighting the effort involved.
I'll gather the information and get back to you ASAP
Focuses on quickly gathering information and responding promptly.
I'll run it by you once I know more
Implies a quick review once more information is available.
FAQs
What's a more formal way to say "I'll find out and let you know"?
For a more formal tone, you could say "I will investigate and inform you" or "I will research the matter and provide an update".
How can I use "I'll find out and let you know" in a sentence?
You can use it when someone asks you a question you don't immediately know the answer to. For example, "I'm not sure about that, but "I'll find out and let you know" as soon as possible.""
What does "I'll find out and let you know" imply?
It implies that you don't currently have the information but are willing to take the necessary steps to obtain it and share it with the person who asked.
Is it appropriate to use "I'll find out and let you know" in a professional setting?
Yes, it's generally acceptable in professional settings, but consider using alternatives like "I will investigate and inform you" for added formality.
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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
4.1/5
Expert rating
Real-world application tested