You know vs You know that

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

You know

Informal Top 2,000 (common)

You know that

Top 2,000 (common)

Most formal: You know that

	You know	You know that
Pronunciation	🇬🇧 //jʊ nəʊ// 🇺🇸 //juː noʊ//	🇬🇧 //juː nəʊ ðæt// 🇺🇸 //ju noʊ ðæt//
Meaning	A phrase used when you think the listener understands or agrees.	It's a way to check if someone understands or agrees.
Example	It's like when you're at a party, and, you know, the music just hits differently.	It's important to save money, you know that.
Register	Informal	Neutral
How common	Top 2,000 (common)	Top 2,000 (common)
Collocations	you know what I mean, you know how, you know the drill	you know that feeling, you know that look, you know that it's true
Antonyms	-	You don't know that, You are unaware that, You have no idea that
Common mistakes	Used too frequently, making speech sound repetitive., Assuming the listener always knows what is being referred to., Overusing it can make speech less clear.	Using 'you know that' too often in a sentence., Omitting 'that', making the phrase sound incomplete., Confusing it with 'do you know' which asks for information.
Usage notes	Common in casual conversations to imply shared understanding. Should be avoided in formal settings.	Used to emphasize a point or check for understanding; appropriate in conversations but can seem repetitive if overused.

See it in real clips

You know any of them old jokes ?

Band Of Brothers › S1 E1

And, you know, it was a feeling that...

Forrest, we have very different lives, you know.

You know any of them old jokes ?

Band Of Brothers › S1 E1

And, you know, it was a feeling that...

You know

You know that day that you once told me about when

Ted Lasso › S1 E1

I don't necessarily know that understanding is what we're doing.

Sherlock › S1 E1

We know from her suitcase that she was intending to stay overnight,

You know that day that you once told me about when

Ted Lasso › S1 E1

I don't necessarily know that understanding is what we're doing.

You know that

Frequently asked questions: You know vs You know that

What's the difference between You know and You know that?

You know: A phrase used when you think the listener understands or agrees. You know that: It's a way to check if someone understands or agrees.

Which is more formal: You know and You know that?

You know that is the most formal of these.

Can you show an example of each?

You know: It's like when you're at a party, and, you know, the music just hits differently. You know that: It's important to save money, you know that.

Can I use You know and You know that interchangeably?

Not always. You know and You know that 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.