Bb7 chord
Bb dominant 7th · also written A#7
C4
Bb
C5
D
F
Ab
Want it in context? Open Bb7 on the full piano.
Notes
- BbR
- D3
- F5
- Abb7
Formula: R – 3 – 5 – b7
Bb7 inversions
The same notes, with a different note in the bass.
Root position Bb7
C4
Bb
C5
D
F
Ab
1st inversion Bb7/D
C5
D
F
Ab
Bb
C6
2nd inversion Bb7/F
C5
F
Ab
Bb
C6
D
3rd inversion Bb7/Ab
C5
Ab
Bb
C6
D
F
More Bb chords
Dominant 7th chords in other keys
FAQ
What notes are in the Bb7 chord?
The Bb dominant 7th chord (Bb7) has 4 notes: Bb, D, F and Ab.
How do you play Bb7 on the piano?
Put your right hand on Bb, D, F and Ab, starting from Bb. A common fingering for three-note chords is thumb (1), middle finger (3) and little finger (5).
What is the formula of a dominant 7th chord?
R – 3 – 5 – b7 (in semitones from the root: 0, 4, 7, 10).
Is Bb7 the same as A#7?
Yes. Bb and A# are the same key on the piano (enharmonic), so Bb7 and A#7 sound the same.