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Dim & aug familyviiø7 in D♭ major

C half-diminished chord

Cm7♭5

C half-diminished

Piano root position

  • Root
  • ♭3
  • ♭5
  • ♭7

Guitar standard tuning

Barre · fret 3

Lay your index flat across strings 5 to 3 at fret 3.

E×ADGBe×12345Barre at fret 3CG♭B♭E♭

Finger: 1 index, 2 middle, 3 ring, 4 little

Notation treble clef

𝄞♭♭♭

Intervals

12 semitones
  1. C1
  2. ♭2
  3. 2
  4. E♭♭3
  5. 3
  6. 4
  7. G♭♭5
  8. 5
  9. ♯5
  10. 6
  11. B♭♭7
  12. 7
  • C Root
  • E♭ Minor 3rd
  • G♭ Diminished 5th
  • B♭ Minor 7th

About this chord

What is a C half-diminished chord?

Cm7♭5 is built from 4 notes: C (the root), E♭ (the ♭3), G♭ (the ♭5), B♭ (the ♭7). The ii chord of a minor key: dark but softer than fully diminished.

Notes
C · E♭ · G♭ · B♭
Formula
1 · ♭3 · ♭5 · ♭7
Also written
Cø7 · Cø
Found in
viiø7 in D♭ major · iiø7 in B♭ minor

Scales that contain Cm7♭5

Neighbours

Chords close to Cm7♭5

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All 348 chords

Every chord type on every root, each with its own page.

C

D♭

D

E♭

E

F

G♭

G

A♭

A

B♭

B