G diminished piano chord (Gdim)

A diminished chord stacks two minor thirds: root, minor third, diminished fifth. Tense and unstable, it is mostly used as a passing chord.

On the keyboard

Chord notes

NoteInterval
Groot
B♭ (B flat)minor third
D♭ (D flat)diminished fifth

Formula: 1 – b3 – b5 · G – B♭ – D♭

A progression with this chord

  1. Gdimvii°
    GB♭D♭
  2. CA♭E♭

The diminished chord works as a passing chord to the chord a semitone above.

Other G chords

The same chord on other roots