C-sharp major
| Relative key | A-sharp minor |
|---|---|
| Parallel key | C-sharp minor |
| Dominant key | G-sharp major (theoretical) →enharmonic : A-flat major |
| Subdominant key | F-sharp major |
| Enharmonic key | D-flat major |
| Component pitches | |
| C♯, D♯, E♯, F♯, G♯, A♯, B♯ | |
C-sharp major is a major scale based on C♯, consisting of the pitches C♯, D♯, E♯, F♯, G♯, A♯, and B♯. Its key signature has seven sharps. Its relative minor is A-sharp minor (or enharmonically B-flat minor), its parallel minor is C-sharp minor, and its enharmonic equivalence is D-flat major.
The C-sharp major scale is:
Changes needed for the melodic and harmonic versions of the scale are written in with accidentals as necessary. The C-sharp harmonic major and melodic major scales are:
A harp tuned to C-sharp major has all its pedals in the bottom position. Because all the strings are then pinched and shortened, this is the least resonant key for the instrument.