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Cm9b5 chord

C Half-Diminished 9th

Cm9b5 · Piano chord

1C4b3Eb4b5Gb4b7Bb49D5
C31C4C59b3b5b7

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Notes

C – Eb – Gb – Bb – D

Formula

1 – b3 – b5 – b7 – 9

Practice Note

The half-diminished ninth is a minor-key ii chord commonly paired with Locrian natural 2.

Try next

Cm7b5 · SimplerCm9 · SiblingF7b9 · Next in ii–VBbm · ii–V–i target

About Cm9b5

The Cm9b5 chord sounds distinctive, with a half-diminished 9th character. Its notes are C, Eb, Gb, Bb, D.

All C chords (58)

Triads

C — MajorCm — MinorCdim — DiminishedCaug — AugmentedCsus2 — Suspended 2ndCsus4 — Suspended 4thC5 — Power Chord

7ths

C7 — Dominant 7thCmaj7 — Major 7thCm7 — Minor 7thCdim7 — Diminished 7thCm7b5 — Half-Diminished 7thC6 — Major 6thCm6 — Minor 6thC7sus4 — Dominant 7th Sus4C7sus2 — Dominant 7th Sus2

Extended

C9 — Dominant 9thCmaj9 — Major 9thCm9 — Minor 9thCadd9 — Add 9Cadd11 — Add 11Cadd2 — Add 2Cadd#11 — Add Sharp 11C11 — Dominant 11thC13 — Dominant 13thC6/9 — 6/9Cmaj13 — Major 13thCm(add2) — Minor Add 2Cm(add9) — Minor Add 9Cm(add11) — Minor Add 11CmMaj7 — Minor Major 7thCm11 — Minor 11thCm13 — Minor 13thCm6/9 — Minor 6/9C7#11 — Dominant 7th Sharp 11C9#11 — Dominant 9th Sharp 11C13#11 — Dominant 13th Sharp 11C9sus4 — Dominant 9th Sus4C13sus4 — Dominant 13th Sus4Cmaj7#11 — Major 7th Sharp 11Cmaj9#11 — Major 9th Sharp 11CmMaj9 — Minor Major 9th

Altered

C7#9 — Dominant 7th Sharp 9C7b9 — Dominant 7th Flat 9C7#5 — Dominant 7th Sharp 5C7b5 — Dominant 7th Flat 5C7alt — Altered DominantC7#9#5 — Dominant 7th #9 #5C7b9b5 — Dominant 7th b9 b5C7#9b5 — Dominant 7th #9 b5C7sus4b9 — Dominant 7th Sus4 Flat 9C9#5 — Dominant 9th Sharp 5C9b5 — Dominant 9th Flat 5C13b9 — Dominant 13th Flat 9C7b13 — Dominant 7th Flat 13Caug7 — Augmented 7thCdim(maj7) — Diminished Major 7thCaugMaj7 — Augmented Major 7th