Of course vs Oh god yes

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

Of course

Top 1,000 (very common)

Oh god yes

Informal Beyond 10,000 (less common)

Most formal: Of course Most common: Of course

	Of course	Oh god yes
Pronunciation	🇬🇧 //əv kɔːs// 🇺🇸 //əv kɔrs//	🇬🇧 //əʊ gɒd jɛs// 🇺🇸 //oʊ ɡɑd jɛs//
Meaning	Definitely, it's obvious.	An enthusiastic affirmation or agreement.
Example	Are you joining us for dinner tonight? Of course!	When she suggested a beach trip, I responded, 'Oh god yes!'
Register	Neutral	Informal
How common	Top 1,000 (very common)	Beyond 10,000 (less common)
Collocations	of course not, of course yes, of course you can, of course it is	Oh god yes, please, Oh god yes, absolutely, Oh god yes, I agree, Oh god yes, that sounds great
Common mistakes	Using it in formal writing where a different expression is needed., Confusing it with other affirmations like 'certainly' or 'definitely'.	Used in serious contexts, misunderstanding its informal nature., Omitting 'Oh' and saying only 'God yes', which feels less expressive., Misplacing emphasis, making it sound sarcastic instead of genuine.
Usage notes	Used in informal and formal situations to affirm something obvious. Avoid in highly formal writing.	Used in casual conversations to express strong agreement or excitement. Not suitable for formal situations.

See it in real clips

Of course.

Agatha Christies Poirot › S1 E1

You know her, of course.

And, of course, I paid my respect to Bubba himself.

Of course.

Agatha Christies Poirot › S1 E1

You know her, of course.

Of course

Sherlock › S1 E1

- Want to see some more? - Oh, God, yes.

Oh god yes

Frequently asked questions: Of course vs Oh god yes

What's the difference between Of course and Oh god yes?

Of course: Definitely, it's obvious. Oh god yes: An enthusiastic affirmation or agreement.

Which is more formal: Of course and Oh god yes?

Of course is the most formal of these.

Which is more common: Of course and Oh god yes?

Of course is the most common in everyday English.

Can you show an example of each?

Of course: Are you joining us for dinner tonight? Of course! Oh god yes: When she suggested a beach trip, I responded, 'Oh god yes!'

Can I use Of course and Oh god yes interchangeably?

Not always. Of course and Oh god yes 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.