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Key

Key of C♯ major

C♯ major is spelled C♯, D♯, F, F♯, G♯, A♯, C. Signature: 7 sharps (F♯ C♯ G♯ D♯ A♯ E♯ B♯).

  • 7 sharps
  • Relative B♭
  • Play the scale

C♯ major

Notes, signature and the chords of the key

C♯ major uses 7 sharps (F♯ C♯ G♯ D♯ A♯ E♯ B♯). Its relative minor is B♭ minor. The scale is C♯ – D♯ – F – F♯ – G♯ – A♯ – C.

DegreeChordRoot frequency
IC♯ major277.18 Hz
iiD♯ minor311.13 Hz
iiiF minor349.23 Hz
IVF♯ major369.99 Hz
VG♯ major415.30 Hz
viA♯ minor466.16 Hz
vii°C diminished523.25 Hz

Tonic note page: C♯4. Matching scale page: C♯ major scale.

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Explore the cluster

C♯ minor The parallel key, same tonic, other mode. Parallel key → C♯ major scale The scale on its own, with playback. Play the scale → C♯ major chord Just the tonic chord, with its notes and frequencies. Tonic chord →

FAQ

C♯ major questions

How many sharps or flats are in C♯ major?

7 sharps (F♯ C♯ G♯ D♯ A♯ E♯ B♯).

What is the relative minor of C♯ major?

B♭ minor, which shares this signature.

Are these chord qualities for the harmonic minor?

No. Minor keys on this page use the natural minor, so the v chord is minor. Harmonic and melodic minor are a later batch.