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B Dominant 9th Chord (B9)

Notes: B, D♯, F♯, A, C♯. Tap any diagram to hear it.

B9
Notes
BD♯F♯AC♯
Formula
1 – 3 – 5 – ♭7 – 9

B9 on guitar

Fret 4 · most common
7-4-4-4-4-5
Fret 7
7-9-7-8-7-9
Fret 11
x-14-11-14-12-11

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

B9 on ukulele

Fret 3 · most common
4-3-5-4
Fret 6
6-9-7-6

B9 on piano

Other B chords

BBmB7Bmaj7Bm7Bsus2Bsus4BdimBaugB6Bm6Badd9B7sus4Bm7♭5Bdim7

Dominant 9th chords in other keys

C9C♯9D9E♭9E9F9F♯9G9A♭9A9B♭9

About the B Dominant 9th chord

Dominant ninth chords extend the seventh chord with a ninth, for the rich sound of funk, soul and jazz. B9 is built from the root (B), major third (D♯), perfect fifth (F♯), minor seventh (A), major ninth (C♯).

Frequently asked questions

What notes are in the B Dominant 9th chord?

The B9 chord is made of B, D♯, F♯, A, C♯: the root, major third, perfect fifth, minor seventh, major ninth.

How do you play B9 on guitar?

The most common fingering is 7-4-4-4-4-5, from the low E string to the high E string (x = don’t play that string, 0 = open string). It uses a barre at fret 4.

How do you play B9 on piano?

Press B, D♯, F♯, A, C♯ together. In root position the lowest note is B.