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C Dominant 9th Chord (C9)

Notes: C, E, G, B♭, D. Tap any diagram to hear it.

C9
Notes
CEGB♭D
Formula
1 – 3 – 5 – ♭7 – 9

C9 on guitar

Open position · most common
x-3-0-3-1-0
Fret 5
8-5-5-5-5-6
Fret 8
8-10-8-9-8-10

Strings from low (left) to high (right). Numbers are fingers: 1 index, 2 middle, 3 ring, 4 pinky. × = don’t play, ○ = open string.

C9 on ukulele

Open position · most common
3-2-0-3
Fret 6
7-0-6-7

C9 on piano

Other C chords

CCmC7Cmaj7Cm7Csus2Csus4CdimCaugC6Cm6Cadd9C7sus4Cm7♭5Cdim7

Dominant 9th chords in other keys

C♯9D9E♭9E9F9F♯9G9A♭9A9B♭9B9

About the C Dominant 9th chord

Dominant ninth chords extend the seventh chord with a ninth, for the rich sound of funk, soul and jazz. C9 is built from the root (C), major third (E), perfect fifth (G), minor seventh (B♭), major ninth (D).

Frequently asked questions

What notes are in the C Dominant 9th chord?

The C9 chord is made of C, E, G, B♭, D: the root, major third, perfect fifth, minor seventh, major ninth.

How do you play C9 on guitar?

The most common fingering is x-3-0-3-1-0, from the low E string to the high E string (x = don’t play that string, 0 = open string).

How do you play C9 on piano?

Press C, E, G, B♭, D together. In root position the lowest note is C.