Of Course or Ofcourse: Which Spelling Is Correct?
Of course or ofcourse: which spelling is correct? Always write of course as two words. Ofcourse as one word is never correct in standard English, and no major dictionary lists it. The phrase is a preposition plus a noun, and the two words keep their space in every context, from formal essays to casual texts. Test your sentence with our free Grammar Checker and Spelling Quiz, and use the two word test below when the joined form feels tempting.
The mistake is easy to understand, because in fast speech “of course” sounds like one smooth word, and quick typing on a phone can drop the space. The rule stays simple though: if you can say “of” and “course” as two separate words, write them that way. Our atleast or at least guide shows the same trap for another phrase where a missing space turns a correct phrase into a spelling error.
Quick answer
Write of course as two words, always. Ofcourse is not a word in any dictionary, not in formal writing, not in casual writing, and not in any variety of English. If your spell checker flags ofcourse, trust it and add the space.
Memory trick: Of course has two words because it has two jobs: of is a preposition and course is a noun. Say “of” and then “course” with a small pause, and the space appears on its own.
When to use of course to agree
Use of course when you agree to a request, give permission, or say yes in a warm and willing way. This is the most common use of the phrase, and it works in emails, texts, and spoken conversation alike. The phrase sounds helpful and open, so it fits requests from friends, coworkers, and customers. GrammarPaths’ of course guide states the same rule: of course is always two words, ofcourse has no dictionary entry, and the error comes from how the phrase sounds in fast speech.
✓ Of course you can join us for dinner.
✓ Of course I will help you with the report.
✓ Of course, take my seat.
✓ Of course you may borrow the book.
✓ Of course, I would love to come.
✓ Of course we can meet on Monday.
In each of these sentences, of course replaces a plain yes with a friendlier yes, and the meaning stays the same if you swap in “certainly” or “absolutely.” That swap test is a useful check: if “certainly” fits in the sentence, of course is the right phrase, and it always takes a space. The phrase also works at the end of a sentence, as in “You can join us, of course,” where it adds a warm and easy tone to the agreement.
Customer service teams use of course more than almost any other phrase, because it turns a plain yes into a willing yes. A reply that says “Of course, I will check that for you” sounds far more helpful than a bare “Yes,” and the same warmth works in job interviews, where “Of course, I would be glad to” answers a request with confidence. In all of these cases the spelling stays the same, two words with a space, no matter how friendly or formal the setting.
✓ Of course, I will check that for you right away.
✓ Of course, I would be glad to help.
✓ You can stay as long as you like, of course.
✓ I will send the file today, of course.
When to use of course to mean obviously
Use of course when something is obvious, expected, or natural, and you want to point that out. Here the phrase means “naturally” or “as you would expect,” and it often answers a question that feels easy. This use appears in essays, explanations, and everyday talk, and it carries a light tone that can turn sharp if you are not careful, so save it for facts that really are obvious to your reader.
✓ Of course the sun rises in the east.
✓ She passed the test, of course, after weeks of study.
✓ Of course prices rise when demand is high.
✓ Of course practice makes the skill stronger.
✓ He knew the answer, of course, because he had read the book.
✓ Of course the team celebrated after the win.
The obvious sense also appears in the firm reply “of course not,” which means a clear no. Writers often pair it with a comma at the start of a sentence, as in “Of course, you may leave early,” and the comma belongs there because the phrase introduces the main clause. Our any more or anymore guide shows the same meaning test for another phrase where the space changes what the words say.
Essays use of course to state facts that the reader should accept without argument, as in “Of course, the data supports the claim,” and the phrase works because it signals shared knowledge. Use it sparingly in essays, though, since too many obvious claims can sound dismissive, and a reader who does not find the fact obvious may feel talked down to. One of course per essay is usually enough.
✓ Of course, the data supports the claim.
✓ Of course, the method has limits, and the paper names them.
✓ Of course not, I would never share your secret.
✓ Of course, the answer was in the book all along.
The tricky exceptions
Ofcourse is never correct, even in texts
Some writers argue that ofcourse is fine in casual texts or social media posts, but that is not true. No dictionary lists ofcourse, no style guide accepts it, and teachers and editors mark it as a spelling error in every register. Fast typing explains the mistake, and autocorrect often misses it, but the standard stays the same: two words, always, in every kind of writing.
✗ Ofcourse I agree with you. (Wrong: use of course)
✓ Of course I agree with you.
Of course versus off course: a different phrase entirely
Do not confuse “of course” with “off course,” which is a different phrase with a different meaning. Off course means away from the planned path, as in “The plane went off course in the storm,” while of course means certainly or obviously. The two phrases sound alike in fast speech, but the spelling tells the reader which one you mean. Write “off course” with two f letters when you mean a path, and “of course” with one f when you mean agreement. Our some time or sometime guide shows the same sound alike trap for another pair where one letter changes the meaning.
✓ The ship drifted off course in the fog.
✓ Of course the ship reached the port safely.
Punctuation: the comma after of course
When “of course” opens a sentence, put a comma after it, as in “Of course, I will help.” When it sits in the middle of a sentence, commas go on both sides, as in “I will, of course, help you.” When it ends a sentence, one comma before it is enough, as in “I will help, of course.” The commas mark the phrase as an aside, and they keep the sentence easy to read.
✓ Of course, you can ask me anything.
✓ I will, of course, finish the work today.
Of course vs ofcourse at a glance
| Form | Correct? | Meaning |
|---|---|---|
| of course | Yes, always | Certainly, naturally, as expected |
| ofcourse | No, never | Not a word, a spelling error |
| of course not | Yes | A firm and clear no |
| off course | Yes, different phrase | Away from the planned path |
| offcourse | No, never | Not a word, a spelling error |
| of course, | Yes, with a comma | Correct punctuation at a sentence start |
Quick practice
Choose the correct form for each sentence:
- ___ I will help you with the project. (Of course / Ofcourse)
- The plane went ___ in the storm. (of course / off course)
- ___ not, I would never tell anyone. (Of course / Ofcourse)
- You can borrow my notes, ___. (of course / ofcourse)
Answer key:
- 1. Of course (always two words when agreeing)
- 2. off course (the plane left its planned path)
- 3. Of course (ofcourse is never correct, even in a firm no)
- 4. of course (two words, with a comma before it at the end)
Frequently Asked Questions
Is ofcourse ever correct?
No, ofcourse is never correct in standard English. No major dictionary lists it, and it counts as a spelling error in formal writing, casual writing, and text messages alike.
What does of course mean?
Of course means certainly, naturally, or as you would expect. It agrees to a request, gives permission, or points out that something is obvious.
Is “of course not” correct?
Yes, “of course not” is correct. It is a firm and polite way to say no, and it always takes a space between of and course.
Final Thoughts
Of course is always two words, and ofcourse is never a word at all, so the rule is one of the simplest in English spelling: keep the space, in every sentence, in every kind of writing. The phrase sounds like one word in fast speech, and phones often fail to flag the joined form, but the dictionary test settles it every time. Remember the swap test, since certainly fits wherever of course fits, and the space will take care of itself.









