Cm7b5 chord (C half-diminished seventh) on guitar
Cm7b5 (C half-diminished seventh) has four notes: C, E flat, G flat and B flat. Its formula is 1, b3, b5, b7. In major keys, Cm7b5 is the viiø7 chord in Db major.
Cm7b5 chord shapes
Finger 1 barres fret 1, then 3 on A, 4 on G, 2 on e.
Fingers: 1 on A, 3 on D, 2 on G, 4 on B.
Finger 1 barres fret 3, then 2 on D, 3 on B, 4 on e.
Finger 1 barres fret 6, then 3 on E, 4 on D, 4 on G, 2 on B.
Fingers: 2 on A, 3 on G, 4 on B, 1 on e.
Finger 1 barres fret 8, then 2 on A, 4 on B.
Hear it and see every shape in ScaleSpace →
| Symbol | Cm7b5 |
|---|---|
| Also written | Cø, Cø7, Cmin7b5, C-7b5 |
| Notes | C Eb Gb Bb |
| Formula | 1 b3 b5 b7 |
| Intervals | root, minor third, tritone, minor seventh |
| Type | Half-diminished seventh chord |
Cm7b5 across the neck
Guitar · 6-string, tuned low to high: E, A, D, G, B, e. 24 frets.
- E string: fret 2 Gb (flat 5), fret 6 Bb (flat 7), fret 8 C (1), fret 11 Eb (flat 3), fret 14 Gb (flat 5), fret 18 Bb (flat 7), fret 20 C (1), fret 23 Eb (flat 3).
- A string: fret 1 Bb (flat 7), fret 3 C (1), fret 6 Eb (flat 3), fret 9 Gb (flat 5), fret 13 Bb (flat 7), fret 15 C (1), fret 18 Eb (flat 3), fret 21 Gb (flat 5).
- D string: fret 1 Eb (flat 3), fret 4 Gb (flat 5), fret 8 Bb (flat 7), fret 10 C (1), fret 13 Eb (flat 3), fret 16 Gb (flat 5), fret 20 Bb (flat 7), fret 22 C (1).
- G string: fret 3 Bb (flat 7), fret 5 C (1), fret 8 Eb (flat 3), fret 11 Gb (flat 5), fret 15 Bb (flat 7), fret 17 C (1), fret 20 Eb (flat 3), fret 23 Gb (flat 5).
- B string: fret 1 C (1), fret 4 Eb (flat 3), fret 7 Gb (flat 5), fret 11 Bb (flat 7), fret 13 C (1), fret 16 Eb (flat 3), fret 19 Gb (flat 5), fret 23 Bb (flat 7).
- e string: fret 2 Gb (flat 5), fret 6 Bb (flat 7), fret 8 C (1), fret 11 Eb (flat 3), fret 14 Gb (flat 5), fret 18 Bb (flat 7), fret 20 C (1), fret 23 Eb (flat 3).
Swipe the chart sideways to see all of it.
Questions
What notes are in the Cm7b5 chord?
Cm7b5 (C half-diminished seventh) has four notes: C, E flat, G flat and B flat. Its formula is 1, b3, b5, b7. C is the root, Eb is the minor third, Gb is the tritone and Bb is the minor seventh.
How do you play Cm7b5 on guitar?
The easiest shape is x31312. Finger 1 barres fret 1, then 3 on A, 4 on G, 2 on e.
What key is Cm7b5 in?
In major keys, Cm7b5 is the viiø7 chord in Db major. It is diatonic to those keys, so it fits songs in any of them.
What is the difference between Cm7b5 and Cdim7?
Cm7b5 and Cdim7 share C, Eb and Gb. Cm7b5 has Bb, the flat 7th, where Cdim7 has Bbb, the double flat 7th.