Cdim7 Piano Chord

The C diminished 7 chord (Cdim7) is made of the notes C, E♭, G♭ and B𝄫. Its formula is 1 – ♭3 – ♭5 – 𝄫7.

Tap the keyboard to hear Cdim7.

Notes in Cdim7

Fingers are numbered from the thumb (1) to the little finger (5).

C – E♭ – G♭ – B𝄫

E♭ – G♭ – B𝄫 – C

G♭ – B𝄫 – C – E♭

B𝄫 – C – E♭ – G♭

Cdim7 is also written as C°7.

Cdim7 is not one of the basic chords of any major or minor key. It is usually used as a passing or colour chord.