Bbm7b5 chord
Bb half-diminished 7th · also written A#m7b5
C4
Bb
C5
Db
Fb
Ab
Want it in context? Open Bbm7b5 on the full piano.
Notes
- BbR
- Dbb3
- Fbb5
- Abb7
Formula: R – b3 – b5 – b7
Bbm7b5 inversions
The same notes, with a different note in the bass.
Root position Bbm7b5
C4
Bb
C5
Db
Fb
Ab
1st inversion Bbm7b5/Db
C5
Db
Fb
Ab
Bb
C6
2nd inversion Bbm7b5/Fb
C5
Fb
Ab
Bb
C6
Db
3rd inversion Bbm7b5/Ab
C5
Ab
Bb
C6
Db
Fb
More Bb chords
Half-diminished 7th chords in other keys
FAQ
What notes are in the Bbm7b5 chord?
The Bb half-diminished 7th chord (Bbm7b5) has 4 notes: Bb, Db, Fb and Ab.
How do you play Bbm7b5 on the piano?
Put your right hand on Bb, Db, Fb 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 half-diminished 7th chord?
R – b3 – b5 – b7 (in semitones from the root: 0, 3, 6, 10).
Is Bbm7b5 the same as A#m7b5?
Yes. Bb and A# are the same key on the piano (enharmonic), so Bbm7b5 and A#m7b5 sound the same.