The C♯ Major 9th chord is a five-note chord made up of C♯, E♯, G♯, B♯, and D♯. It is built from a root, major third, perfect fifth, major seventh, and major ninth.
Construction
C♯ Major 9th = Root + Major 3rd + Perfect 5th + Major 7th + Major 2nd = C♯ · E♯ · G♯ · B♯ · D♯
| Note | Interval | Degree |
|---|---|---|
| C♯ | Root | 1 |
| E♯ | Major 3rd | 3 |
| G♯ | Perfect 5th | 5 |
| B♯ | Major 7th | 7 |
| D♯ | Major 2nd | 9 |
Key Signature
A chord has no key signature of its own, but the C♯ Major 9th is the tonic (I) chord of C# Major, whose key signature has 7 sharps (F♯, C♯, G♯, D♯, A♯, E♯, B♯).
F♯C♯G♯D♯A♯E♯B♯
Order of sharps
Sharps are added to a key signature in a fixed order. Each new sharp key adds the next sharp on the list.
F♯C♯G♯D♯A♯E♯B♯
Mnemonic: Father Charles Goes Down And Ends Battle
Chords in the Key of C♯ Major
These are the triads built on each degree of the C♯ major scale:
C♯ Major 9th — Frequently Asked Questions
What is the C♯ Major 9th chord on piano?
The C♯ Major 9th chord contains the notes C♯ – E♯ – G♯ – B♯ – D♯. On piano, play these notes together to sound the chord.
What notes are in the C# Major 9th chord?
C# Major 9th is built from the C# root. Check the interactive keyboard above for exact notes and fingering.
How is the C# Major 9th chord used in music?
C# Major 9th appears in jazz, pop, and classical contexts. Its sound depends on the chord quality (Major 9th).
What is the fingering for C# Major 9th?
See the fingering chart above. Right hand typically uses thumb on root. Left hand uses pinky on root.
What are the inversions of C# Major 9th?
Use the inversion buttons above to see each inversion with notes, fingering, and staff notation.