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B♭m7♭5 chord

B♭ Half-Diminished 7th

Bbm7b5 · Root

1Bb3b3Db4b5Fb4b7Ab4
C4b5C51b3b7

Every chord tone stacked from the root up.

Click keys to experiment with the chord

Notes

B♭ – D♭ – F♭ – A♭

Formula

1 – b3 – b5 – b7

Practice Note

The half-diminished chord is the usual iiø7 in a minor-key ii–V–i, commonly paired with Locrian or Locrian natural 2. Its b5 and b7 lead into the dominant; the root may be omitted in a piano voicing when supplied by bass.

Try next

Bbm7 · SiblingBbdim7 · SiblingEb7b9 · Next in ii–VAbm · ii–V–i targetDbm6 · Same notesF#9 · Same notes (rootless)

About Bbm7b5

The Bbm7b5 chord sounds dark and ambiguous, the classic jazz ii chord in minor keys. Its notes are Bb, Db, Fb, Ab. This chord is commonly heard in jazz.

Jazz
All Bb chords (61)

Triads

Bb — MajorBbm — MinorBbdim — DiminishedBbaug — AugmentedBbsus2 — Suspended 2ndBbsus4 — Suspended 4thBb5 — Power Chord

7ths

Bb7 — Dominant 7thBbmaj7 — Major 7thBbm7 — Minor 7thBbm7#5 — Minor 7th Sharp 5Bbdim7 — Diminished 7thBb6 — Major 6thBbm6 — Minor 6thBb7sus4 — Dominant 7th Sus4Bb7sus2 — Dominant 7th Sus2

Extended

Bb9 — Dominant 9thBbmaj9 — Major 9thBbm9 — Minor 9thBbadd9 — Add 9Bbadd11 — Add 11Bbadd2 — Add 2Bbadd#11 — Add Sharp 11Bb11 — Dominant 11thBb13 — Dominant 13thBb6/9 — 6/9Bbmaj13 — Major 13thBbm(add2) — Minor Add 2Bbm(add9) — Minor Add 9Bbm(add11) — Minor Add 11BbmMaj7 — Minor Major 7thBbm11 — Minor 11thBbm13 — Minor 13thBbm6/9 — Minor 6/9Bb7#11 — Dominant 7th Sharp 11Bb9#11 — Dominant 9th Sharp 11Bb13#11 — Dominant 13th Sharp 11Bb9sus4 — Dominant 9th Sus4Bb13sus4 — Dominant 13th Sus4Bbmaj7#11 — Major 7th Sharp 11Bbmaj9#11 — Major 9th Sharp 11BbmMaj9 — Minor Major 9thBbm9b5 — Half-Diminished 9th

Altered

Bb7#9 — Dominant 7th Sharp 9Bb7b9#9 — Dominant 7th Flat 9 Sharp 9Bb13#9 — Dominant 13th Sharp 9Bb7b9 — Dominant 7th Flat 9Bb7#5 — Dominant 7th Sharp 5Bb7b5 — Dominant 7th Flat 5Bb7alt — Altered DominantBb7#9#5 — Dominant 7th #9 #5Bb7b9b5 — Dominant 7th b9 b5Bb7#9b5 — Dominant 7th #9 b5Bb7sus4b9 — Dominant 7th Sus4 Flat 9Bb9#5 — Dominant 9th Sharp 5Bb9b5 — Dominant 9th Flat 5Bb13b9 — Dominant 13th Flat 9Bb7b13 — Dominant 7th Flat 13Bbaug7 — Augmented 7thBbdim(maj7) — Diminished Major 7thBbaugMaj7 — Augmented Major 7th