Music Guide #2 – The Key Of C# Major

Chords In The Key Of C# Major

What are the chords in the key of C Sharp major?

Take a look at notes and chords in the key of C sharp. This note/chord is the enharmonic equivalent of D flat. This means that it makes use of the same key(s) on your piano keyboard.

Firstly, let’s talk about the C sharp major scale. Like other major scales, the C# major scale follows the formula, root note, whole tone, whole tone, half tone, whole tone, whole tone, whole tone, half tone. The notes of the C# major scale are therefore, C# D# E# F# G# A# B# C#.

There’s a total of 7 sharps in this scale as seen above. Every note in this scale is sharp. The relative minor of C sharp major is A sharp minor.

Take a look at the chords in the key of C sharp. Each chord is based on one of the notes in the major scale. In other words, each note is a root note for one of the chords in the key of C sharp. To come up with these chords, we follow the pattern, major minor minor major major minor diminished.

Therefore the triad chords in the key of C sharp are C#maj, D#min, E#min, F#maj, G#maj, A#maj and B#dim. The four note extended chords based on the C sharp major scale are C#maj7, D#min7, E#min7, F#maj7, G#7, A#min7 and B#m7b5.

In the list of chords that follows this paragraph, numerals indicate the position of each chord in the scale. Capital letters are used for major chords. These are chord I, chord IV and chord V. Small letters are used for the minor chords, chord ii, chord iii and chord vi, as well as for the diminished chord vii°.

  • 1 – C sharp major (and C sharp major seventh)
  • 2 – D sharp minor (and D sharp minor seventh)
  • 3 – E sharp minor (and E sharp minor seventh)
  • 4 – F sharp major (and F sharp major seventh)
  • 5 – G sharp major (and G sharp dominant seventh)
  • 6 – A sharp minor (and A sharp minor seventh)
  • 7 – B sharp diminished (and B sharp minor seventh flat five)

When we add sevenths to these chords we end up with C major seventh, D minor seventh, E minor seventh, F major seventh, G dominant seventh, A minor seventh, and B minor seventh flat five (which on your instrument is the same as B half diminished seventh).

The following is the Key Chord Chart shows all the triads in C major as well as four note extended chords.

Piano Chords In The Key Of C Sharp Major

C-sharp major

C-sharp major (or the key of C-sharp) is a major scale based on C♯, consisting of the pitches C♯, D♯, E♯, F♯, G♯, A♯, and B♯. It is enharmonically equivalent to D-flat major. Its key signature has seven sharps.

Relative key: A-sharp minor enharmonic: B-flat minor

Parallel key: C-sharp minor

Dominant key: G-sharp major enharmonic: A-flat major

Subdominant: F-sharp major enharmonic: G-flat major

Enharmonic: D-flat major

Component pitches

C♯, D♯, E♯, F♯, G♯, A♯, B♯

A-sharp minor

A-sharp minor is a minor scale based on A♯, consisting of the pitches A♯, B♯, C♯, D♯, E♯, F♯, and G♯. Its key signature has seven sharps, while the direct enharmonic equivalent, B-flat minor, has five flats.

Its relative major is C-sharp major (or enharmonically D-flat major), and its parallel major is A-sharp major, usually replaced by B-flat major, since A-sharp major’s three double-sharps make it impractical to use.

Relative key: C-sharp major enharmonic: D-flat major

Parallel key: A-sharp major enharmonic: B-flat major

Dominant key: E-sharp minor enharmonic: F minor

Subdominant: D-sharp minor enharmonic: E-flat minor

Enharmonic: B-flat minor

Component pitches

A♯, B♯, C♯, D♯, E♯, F♯, G♯


D-flat major

D-flat major (or the key of D-flat) is a major scale based on D♭, consisting of the pitches D♭, E♭, F, G♭, A♭, B♭ and C. It is enharmonically equivalent to C-sharp major. Its key signature has five flats.

Relative key: B-flat minor enharmonic: A-sharp minor

Parallel key: D-flat minor enharmonic: C-sharp minor

Dominant key: A-flat major

Subdominant: G-flat major enharmonic: F-sharp major

Enharmonic: C-sharp major

Component pitches

D♭, E♭, F, G♭, A♭, B♭, C

B-flat minor

B-flat minor is a minor scale based on B♭, consisting of the pitches B♭, C, D♭, E♭, F, G♭, and A♭. Its key signature has five flats. Its relative major is D-flat major and its parallel major is B-flat major. Its enharmonic equivalent, A-sharp minor, which would contain seven sharps, is not normally used.

Relative key: D-flat major enharmonic: C-sharp major

Parallel key: B-flat major

Dominant key: F minor

Subdominant: E-flat minor enharmonic: D-sharp minor

Enharmonic: A-sharp minor

Component pitches

B♭, C, D♭, E♭, F, G♭, A♭


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