In C♭ major, D is D (flat)The key signature of C♭ major puts a flat on every D.

Is D flat in C♭ major?

In C♭ major, D is D♭: the key signature puts a flat on every D, in every octave, for as long as that signature stands.

The signature of C♭ major is seven flats, B♭, E♭, A♭, D♭, G♭, C♭ and F♭. D♭ is one of them, which is why you never see a flat 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 D♭ inside it — exactly as you would meet it in a piece written in this key.

Every letter in C♭ major

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

  • C is C♭
  • D is D♭ — the letter on this page
  • E is E♭
  • F is F♭
  • 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 D is D♭ there too.

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

Frequently asked questions

Is D flat in C♭ major?
Yes. C♭ major has seven flats, B♭, E♭, A♭, D♭, G♭, C♭ and F♭, and D♭ is one of them, so every D in the key is played as D♭.
What accidental does D carry in C♭ major?
D is D♭ (flat). The signature of C♭ major is seven flats, B♭, E♭, A♭, D♭, G♭, C♭ and F♭. D♭ is one of them, which is why you never see a flat 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 flats, B♭, E♭, A♭, D♭, G♭, C♭ and F♭ — 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.