C#dim7 Piano Chord

A symmetrical chord built from three stacked minor thirds — any note can theoretically serve as the root. Common in jazz, classical and film music for dramatic tension.

Piano

Recommended voicing

C#4 · E4 · G4 · Bb4

How to play the C#dim7 chord on piano

Play the recommended root-position voicing with the right hand: C#4, E4, G4 and Bb4. Suggested fingering is 1–2–3–5 (1 is the thumb).

Notation for C#dim7 chord

Other names: C# diminished 7th, C# dim7, C#°7

Music theory name: diminished seventh chord

Common name: C# diminished seventh chord

Intervals and tones in C#dim7 chord

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

Inversions

1st inversion

E4 · G4 · Bb4 · C#5

2nd inversion

G4 · Bb4 · C#5 · E5

Songs using C#dim7

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