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C half-diminished chord

The Cm7♭5 chord (half-diminished) is made of the notes C, E♭, G♭, B♭. Its formula compared with the major scale is 1 ♭3 ♭5 ♭7.

Cm7♭5

Sevenths · 4 notes

Note names

Open in the chord tool

How it is built

DegreeNoteInterval from the root
1CUnison
♭3E♭Minor third
♭5G♭Diminished fifth
♭7B♭Minor seventh

Inversions

  • Cm7♭5C E♭ G♭ B♭Root position
  • Cm7♭5/E♭E♭ G♭ B♭ CFirst inversion
  • Cm7♭5/G♭G♭ B♭ C E♭Second inversion
  • Cm7♭5/B♭B♭ C E♭ G♭Third inversion

Which keys it belongs to

Cm7♭5 is a diatonic chord, that is, it comes from a degree of the scale, in these keys:

Frequently asked questions

Which notes make up the Cm7♭5 chord?
The notes are C, E♭, G♭, B♭.
What is the formula of the Cm7♭5 chord?
The formula is 1 ♭3 ♭5 ♭7: minor third, diminished fifth, minor seventh.

Texts and tools by , professional musician and developer. Last updated: October 8, 2026.

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