B Dominant 9th
B9
Notes
B · D♯ · F♯ · A · C♯
Intervals
- RootB (1P)
- Major 3rdD♯ (3M)
- Perfect 5thF♯ (5P)
- Minor 7thA (7m)
- Major 9thC♯ (9M)
Fretboard
Adjust labels, frets, and palette in the interactive view.
Voicings & shapes
Rootless voicings (A / B form) (4)
About
The B9 dominant ninth (B–D♯–F♯–A–C♯) extends a dominant 7 with a ninth. The C♯ adds brightness and harmonic richness without affecting the chord’s dominant function — the tritone between D♯ and A is still present and still drives resolution to E. The 3rd and ♭7 remain essential; the 5th is routinely dropped on guitar to make room for the 9th without creating a muddy cluster. Common in funk, jazz, and blues as a more colorful version of the dominant 7. Compared to B7, the 9th adds shimmer and modernity; the resolution tendency is identical.
Chord diagrams
B Dominant 9th voicing charts — tap a sheet to open it full size to save or print.
Similar chords
Chords sharing two or more notes with this one, ranked by overlap.
Scales containing this chord
- B Mixolydian (I)
- A Lydian (II)
- A♭ Phrygian (III)
- D♭ Natural Minor (VII)
- E Major (V)
- E Melodic Minor (V)
- E♭ Locrian (VI)
- F♯ Dorian (IV)
- F♯ Melodic Minor (IV)
Scales whose notes include every chord tone. The Roman numeral (or scale degree) marks the chord root’s position in the scale.