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F in C♯ major

In C♯ major, F is F♯ (sharp)

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In C♯ major, F is F♯ (sharp)The key signature of C♯ major puts a sharp on every F.

Is F sharp in C♯ major?

In C♯ major, F is F♯: the key signature puts a sharp on every F, in every octave, for as long as that signature stands.

The signature of C♯ major is seven sharps, F♯, C♯, G♯, D♯, A♯, E♯ and B♯. F♯ is one of them, which is why you never see a sharp written next to the note — the signature at the start of the staff already said it.

Spelled from the tonic, the C♯ major scale runs C♯, D♯, E♯, F♯, G♯, A♯, B♯ — one of each letter, each carrying whatever the signature gives it. The staff above draws the C♯ major signature and the note F♯ inside it — exactly as you would meet it in a piece written in this key.

Every letter in C♯ major

C♯ major has seven sharps, F♯, C♯, G♯, D♯, A♯, E♯ and B♯. That fixes what each of the seven letters is called in this key:

  • C is C♯
  • D is D♯
  • E is E♯
  • F is F♯ — the letter on this page
  • G is G♯
  • A is A♯
  • B is B♯

C♯ major shares its signature with its relative A♯ minor — the same sharps or flats, so F is F♯ there too.

C♯ major and D♭ major are the same key on the keyboard, written two different ways — so they answer this question differently: F is F♯ in C♯ major, and F in D♭ major.

Frequently asked questions

Is F sharp in C♯ major?
Yes. C♯ major has seven sharps, F♯, C♯, G♯, D♯, A♯, E♯ and B♯, and F♯ is one of them, so every F in the key is played as F♯.
What accidental does F carry in C♯ major?
F is F♯ (sharp). The signature of C♯ major is seven sharps, F♯, C♯, G♯, D♯, A♯, E♯ and B♯. F♯ is one of them, which is why you never see a sharp written next to the note — the signature at the start of the staff already said it.
What sharps or flats are in C♯ major?
C♯ major has seven sharps, F♯, C♯, G♯, D♯, A♯, E♯ and B♯ — written in that order at the start of the staff.
How is the C♯ major scale spelled?
From the tonic up: C♯, D♯, E♯, F♯, G♯, A♯, B♯. Each letter appears once, carrying whatever the key signature gives it.