C diminished chord (Cdim) on guitar and piano

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C diminished
The C diminished chord (Cdim) is made of the notes C, Eb and Gb. It is built from the root C with a minor third and a diminished fifth.
The diminished chord is unstable and tense: it is mostly used as a passing chord between two other chords.

C diminished

Notes: C – Eb – Gb
Guitar — positions on the neck
Cdim××31243Cdim××81231Cdim××101243
Piano — root position and inversions
CdimC135C Eb GbCdimCC125Eb Gb CCdimC135Gb C Eb

Fingerings and positions

On guitar, this chord can be played in 3 ways along the neck. It is most often played with a barre. Example fingering (from the low E string to the high E string, x = muted string): x3454x. On piano, the right hand plays 3 notes, in root position or in an inversion.

Notes and intervals

Note
Interval
C
root
Eb
minor third
Gb
diminished fifth
In which keys? The C diminished chord is the vii° of C# major and the ii° of Bb minor.

Neighbouring chords

Try it in the app

Hear the chords, play them as a progression, switch instrument, note names (Do Ré Mi or C D E) and theme:

Frequently asked questions

What are the notes of the C diminished chord?

The notes of the C diminished chord (Cdim) are C, Eb and Gb.

How do you play the C diminished chord on guitar?

On guitar, this chord can be played in 3 ways along the neck. It is most often played with a barre. Example fingering (from the low E string to the high E string, x = muted string): x3454x.

How is the C diminished chord built?

The C diminished chord (Cdim) is made of the notes C, Eb and Gb. It is built from the root C with a minor third and a diminished fifth.