Copy that vs Got it vs Understood vs Will do

When to use each in English, with meaning, register, and examples.

Copy that

InformalTop 2,000 (common)

Got it

InformalTop 1,000 (very common)

Understood

Top 1,000 (very common)

Will do

Most formal: Understood
 Copy thatGot itUnderstoodWill do
Pronunciation🇬🇧 //ˈkɒpi θæt//🇺🇸 //ˈkɑpi θæt//🇬🇧 //ɡɒt ɪt//🇺🇸 //ɡɑt ɪt//🇬🇧 //ˌʌndəˈstʊd//🇺🇸 //ˌʌndərˈstʊd//
MeaningI understand you or I will do that.I understandTo know or comprehend something.
ExampleWhen you’re ready, just say 'copy that'.After she explained the plan, I said, 'Got it!'After the explanation, I finally understood the problem.-
RegisterInformalInformalNeutral-
How commonTop 2,000 (common)Top 1,000 (very common)Top 1,000 (very common)-
Collocationscopy that, over, copy that, roger, copy that, understoodgot it covered, got it right, got it all figured outfully understood, clearly understood, never understood, easily understood-
Antonymsignore that, disregard that, neglect that-misunderstood, confused, ignorant-
Common mistakesUsing in formal contexts., Confusing with 'copy' as a verb., Not responding after saying 'copy that'.Using 'got it' instead of 'have it' in formal contexts., Confusing 'got it' with 'gotcha' in terms of meaning., Not using appropriate responses after saying 'got it'.Confused with 'understand' in different tenses., Using 'understood' in present tense situations., Mispronouncing the word, leading to misunderstandings.-
Usage notesUsed to acknowledge understanding in casual conversations, often in radio communication. Avoid in formal writing or speeches.Used in casual conversation to show understanding. Avoid in formal situations or written communication.Use 'understood' in past tense contexts or when confirming comprehension. Avoid in formal writing where 'comprehended' may be preferred.-

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Copy that
Got it
Understood
Will do

Frequently asked questions: Copy that vs Got it vs Understood vs Will do

What's the difference between Copy that, Got it, Understood, and Will do?

Copy that: I understand you or I will do that. Got it: I understand Understood: To know or comprehend something. Will do:

Which is more formal: Copy that, Got it, Understood, and Will do?

Understood is the most formal of these.

Can I use Copy that, Got it, Understood, and Will do interchangeably?

Not always. Copy that, Got it, Understood, and Will do are related and overlap in some contexts, but they differ in register, how common they are, and usage, so swapping one for another can change the meaning or tone. Check the differences above before substituting.