C#9 chord
C# dominant 9th · also written Db9
C4
C#
E#
G#
B
C5
D#
Want it in context? Open C#9 on the full piano.
Notes
- C#R
- E#3
- G#5
- Bb7
- D#9
Formula: R – 3 – 5 – b7 – 9
C#9 inversions
The same notes, with a different note in the bass.
Root position C#9
C4
C#
E#
G#
B
C5
1st inversion C#9/E#
C4
E#
G#
B
C5
C#
2nd inversion C#9/G#
C4
G#
B
C5
C#
E#
3rd inversion C#9/B
C4
B
C5
C#
E#
G#
More C# chords
Dominant 9th chords in other keys
FAQ
What notes are in the C#9 chord?
The C# dominant 9th chord (C#9) has 5 notes: C#, E#, G#, B and D#.
How do you play C#9 on the piano?
Put your right hand on C#, E#, G#, B and D#, starting from C#. A common fingering for three-note chords is thumb (1), middle finger (3) and little finger (5).
What is the formula of a dominant 9th chord?
R – 3 – 5 – b7 – 9 (in semitones from the root: 0, 4, 7, 10, 14).
Is C#9 the same as Db9?
Yes. C# and Db are the same key on the piano (enharmonic), so C#9 and Db9 sound the same.