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
copy that
Grammar usage guide and real-world examplesUSAGE SUMMARY
"copy that" is a correct and usable phrase in written English.
It is a casual phrase that is used to acknowledge that you heard and understood what the other person said. For example, Person 1: Can you head to the store and pick up some milk? Person 2: Copy that.
✓ Grammatically correct
News & Media
Wiki
Formal & Business
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
44 human-written examples
"Copy that?" "Copy that, Ed".
News & Media
BASE JANGO: Copy that.
News & Media
It is a copy that was also a learning process.
News & Media
It's impossible for anyone to copy that look".
News & Media
Copy that, copy that, copy that.
News & Media
You could copy that approach.
News & Media
Human-verified similar examples from authoritative sources
Similar Expressions
16 human-written examples
The French copied that.
News & Media
"If a book sells 30,000 copies that's a success.
News & Media
Those copies that reached the shops were quickly snapped up.
News & Media
They gave me physical copies, that rarely happens.
News & Media
They did weird copies that came out in blue ink.
News & Media
Expert writing Tips
Best practice
Use "copy that" in informal settings, such as casual conversations or internal team communications, where brevity and quick acknowledgement are valued.
Common error
Avoid using "copy that" in formal business reports, academic papers, or presentations. Opt for more professional alternatives like "acknowledged" or "understood" to maintain a suitable tone.
Linguistic Context
The phrase "copy that" primarily functions as an interjection or response. Ludwig AI confirms its use to acknowledge receipt and understanding of a message. Similar to "roger" or "understood", it's a quick way to communicate comprehension.
Frequent in
News & Media
46%
Wiki
20%
Formal & Business
8%
Less common in
Academia
0%
Science
26%
Reference
0%
Ludwig's WRAP-UP
In summary, "copy that" is a grammatically correct phrase used for acknowledging and confirming receipt of information, as validated by Ludwig AI. It's commonly used in informal settings. While its origins are rooted in radio communications, its informal tone makes it unsuitable for formal contexts. The phrase appears most frequently in news and media sources but can also be seen in wiki and formal business contexts. For professional settings, consider using more formal alternatives such as "acknowledged" or "understood".
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
Understood
Directly conveys understanding of the received information.
Got it
Informal and succinct way to indicate understanding.
Affirmative
A more formal acknowledgement, often used in professional or structured settings.
Roger
A concise acknowledgement, originating from radio communication protocols.
Acknowledged
Formal way to confirm receipt of information.
Message received
Explicitly states that the message was received.
I understand
States comprehension of the information.
Noted
Confirms that information has been taken into account.
Okay
Simple agreement and confirmation.
Will do
Indicates agreement and intention to carry out the instruction.
FAQs
How can I use "copy that" in a sentence?
You can use "copy that" to acknowledge instructions or information. For example: "Can you send me the report?" "Copy that, sending it now."
What's a more formal alternative to "copy that"?
Alternatives include "acknowledged", "understood", or "message received", which are suitable for professional settings.
When is it inappropriate to use "copy that"?
It's generally inappropriate in formal writing or when addressing someone of higher authority. Stick to professional language in those situations.
Is "copy that" grammatically correct?
Yes, "copy that" is grammatically acceptable in informal contexts as a short way to say "I understand and will comply".
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.