Skip to content
Quickeys.app

C#add9 chord

C# added 9th · also written Dbadd9

C4
C#
E#
G#
C5
D#

Want it in context? Open C#add9 on the full piano.

Notes

  • C#
    R
  • E#
    3
  • G#
    5
  • D#
    9

Formula: R – 3 – 5 – 9

C#add9 inversions

The same notes, with a different note in the bass.

Root position C#add9

C4
C#
E#
G#
C5

1st inversion C#add9/E#

C4
E#
G#
C5
C#

2nd inversion C#add9/G#

C4
G#
C5
C#
E#

FAQ

What notes are in the C#add9 chord?

The C# added 9th chord (C#add9) has 4 notes: C#, E#, G# and D#.

How do you play C#add9 on the piano?

Put your right hand on C#, E#, G# 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 added 9th chord?

R – 3 – 5 – 9 (in semitones from the root: 0, 4, 7, 14).

Is C#add9 the same as Dbadd9?

Yes. C# and Db are the same key on the piano (enharmonic), so C#add9 and Dbadd9 sound the same.