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C#7b5 Piano Chord

A tense jazz chord with a tritone replacing the perfect fifth. Often serves as a tritone substitution in jazz progressions — replacing the classic dominant seventh chord.

Piano

Recommended voicing
C#4 · E#4 · G4 · B4

How to play the C#7b5 chord on piano

Play the recommended root-position voicing with the right hand: C#4, E#4, G4 and B4. Suggested fingering is 1–2–3–5 (1 is the thumb).

Other names for the C#7b5 chord

Other names: C# 7th flat 5

Music theory name: seventh flat five chord

Common name: C# 7b5 chord

Notes and intervals in the C#7b5 chord

Note Interval
C# Root
E# Major 3rd
G Diminished 5th
B Minor 7th

Inversions

1st inversion
E#4 · G4 · B4 · C#5
2nd inversion
G4 · B4 · C#5 · E#5

More chords with C# as the root

The same chord type in other keys