C#m7b5 chord on piano

C Sharp Half-Diminished, also written Dbm7b5. Notes: C#, E, G and B.

C#m7b5 piano chord, root positionC4EGBC5C#
Root position. Tap any key to hear it.

How to play C#m7b5

  1. Find C# at or above middle C. That is the root.
  2. Add E, G and B above it, skipping the keys in between.
  3. Right hand fingering: 1-2-3-5. Left hand: 5-3-2-1.

Notes

C#root
Eb3 · minor third
Gb5 · diminished fifth
Bb7 · minor seventh

C#m7b5 inversions

An inversion moves the lowest note up an octave. Same notes, smoother jumps between chords.

C#m7b5 Root positionC4EGBC5C#

Root position

C# · E · G · B
C#m7b5 1st inversionC4EGBC5C#

1st inversion

E · G · B · C#
C#m7b5 2nd inversionC4GBC5EC#

2nd inversion

G · B · C# · E
C#m7b5 3rd inversionC4BC5EGC#

3rd inversion

B · C# · E · G

Notes and theory

C#root
Eb3 · minor third
Gb5 · diminished fifth
Bb7 · minor seventh

The half-diminished chord (minor seventh flat five) is the ii chord of a minor key and a key part of minor ii-V-i progressions in jazz. The formula is 1 b3 b5 b7, and you will also see it written as C#ø and C#m7(b5).

Keys that use C#m7b5

More C# chords

All C# piano chords

half-diminished chords in every key

Questions

What notes are in the C#m7b5 chord?

C#m7b5 (C sharp half-diminished) is made of four notes: C# (root), E (minor third), G (diminished fifth) and B (minor seventh).

How do you play C#m7b5 on piano?

Play C#, E, G and B together. With the right hand use fingers 1-2-3-5; with the left hand use 5-3-2-1.

What are the inversions of C#m7b5?

Root position: C# E G B. 1st inversion: E G B C#. 2nd inversion: G B C# E. 3rd inversion: B C# E G.

What key is C#m7b5 in?

C#m7b5 belongs to 2 keys: D major (as the vii°ø7 chord) and B minor (as the ii°ø7 chord).

What does a half-diminished chord sound like?

The half-diminished chord (minor seventh flat five) is the ii chord of a minor key and a key part of minor ii-V-i progressions in jazz.