Bbm7b5 chord (B flat half-diminished seventh) on guitar
Bbm7b5 (B flat half-diminished seventh) has four notes: B flat, D flat, F flat and A flat. Its formula is 1, b3, b5, b7. In major keys, Bbm7b5 is the viiø7 chord in B major.
Bbm7b5 chord shapes
Fingers: 1 on A, 3 on D, 2 on G, 4 on B.
Finger 1 barres fret 1, then 2 on D, 3 on B, 4 on e.
Finger 1 barres fret 4, then 3 on E, 4 on D, 4 on G, 2 on B.
Finger 1 barres fret 6, then 2 on A, 4 on B.
Finger 1 barres fret 6, then 2 on A, 4 on B, 4 on e.
Fingers: 1 on D, 2 on G, 3 on B, 4 on e.
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| Symbol | Bbm7b5 |
|---|---|
| Also written | Bbø, Bbø7, Bbmin7b5, Bb-7b5 |
| Notes | Bb Db Fb Ab |
| Formula | 1 b3 b5 b7 |
| Intervals | root, minor third, tritone, minor seventh |
| Type | Half-diminished seventh chord |
Bbm7b5 across the neck
Guitar · 6-string, tuned low to high: E, A, D, G, B, e. 24 frets.
- E string: fret 0 Fb (flat 5), fret 4 Ab (flat 7), fret 6 Bb (1), fret 9 Db (flat 3), fret 12 Fb (flat 5), fret 16 Ab (flat 7), fret 18 Bb (1), fret 21 Db (flat 3), fret 24 Fb (flat 5).
- A string: fret 1 Bb (1), fret 4 Db (flat 3), fret 7 Fb (flat 5), fret 11 Ab (flat 7), fret 13 Bb (1), fret 16 Db (flat 3), fret 19 Fb (flat 5), fret 23 Ab (flat 7).
- D string: fret 2 Fb (flat 5), fret 6 Ab (flat 7), fret 8 Bb (1), fret 11 Db (flat 3), fret 14 Fb (flat 5), fret 18 Ab (flat 7), fret 20 Bb (1), fret 23 Db (flat 3).
- G string: fret 1 Ab (flat 7), fret 3 Bb (1), fret 6 Db (flat 3), fret 9 Fb (flat 5), fret 13 Ab (flat 7), fret 15 Bb (1), fret 18 Db (flat 3), fret 21 Fb (flat 5).
- B string: fret 2 Db (flat 3), fret 5 Fb (flat 5), fret 9 Ab (flat 7), fret 11 Bb (1), fret 14 Db (flat 3), fret 17 Fb (flat 5), fret 21 Ab (flat 7), fret 23 Bb (1).
- e string: fret 0 Fb (flat 5), fret 4 Ab (flat 7), fret 6 Bb (1), fret 9 Db (flat 3), fret 12 Fb (flat 5), fret 16 Ab (flat 7), fret 18 Bb (1), fret 21 Db (flat 3), fret 24 Fb (flat 5).
Swipe the chart sideways to see all of it.
Questions
What notes are in the Bbm7b5 chord?
Bbm7b5 (B flat half-diminished seventh) has four notes: B flat, D flat, F flat and A flat. Its formula is 1, b3, b5, b7. Bb is the root, Db is the minor third, Fb is the tritone and Ab is the minor seventh.
How do you play Bbm7b5 on guitar?
The easiest shape is x12120. Fingers: 1 on A, 3 on D, 2 on G, 4 on B.
What key is Bbm7b5 in?
In major keys, Bbm7b5 is the viiø7 chord in B major. It is diatonic to those keys, so it fits songs in any of them.
What is the difference between Bbm7b5 and Bbdim7?
Bbm7b5 and Bbdim7 share Bb, Db and Fb. Bbm7b5 has Ab, the flat 7th, where Bbdim7 has Abb, the double flat 7th.