A diminished Chord (Adim) & A diminished 7th Chord on Piano

A piano keyboard reference for the A diminished chord, abbreviated as Adim or A°.

The A diminished triad consists of the notes A, C and E♭. The 2 inversions to the A diminished triad are C E♭ A and E♭ A C.

The A diminished 7th chord, abbreviated as Adim7 or A°7, has the notes A, C, E♭ and G♭. The 3 inversions to the A diminished 7th chord are C E♭ G♭ A, E♭ G♭ A C and G♭ A C E♭.

In the root position, the A diminished chord has the A as the root, the C as the minor third and the E♭ as the diminished fifth. With the A diminished 7th chord there's the addition of G♭ as the diminished seventh.

A diminished chord

notes: A C E♭

• A
• C
• E_♭

A diminished 1st inversion

notes: C E♭ A

• C
• E_♭
• A

A diminished 2nd inversion

notes: E♭ A C

• E_♭
• A
• C

A diminished 7th chord

notes: A C E♭ G♭

• A
• C
• E_♭
• G_♭

A diminished 7th 1st inversion

notes: C E♭ G♭ A

• C
• E_♭
• G_♭
• A

A diminished 7th 2nd inversion

notes: E♭ G♭ A C

• E_♭
• G_♭
• A
• C

A diminished 7th 3rd inversion

notes: G♭ A C E♭

• G_♭
• A
• C
• E_♭

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