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A Diminished Piano Chord

Root
A
Min 3rd
C
b 5th
Eb
PLAY
→
←
E
G
B
D
F
F
A
C
E
A
C
Eb

The Notes in an A Diminished Chord

The Root

You'll have no trouble finding the root of an A Diminished chord, because it's what gives an A Diminished chord it's name: It's the note A.

The Min 3rd

The minor third of an A Diminished chord is C. The minor third is up three half-steps from the Root.

Finding C from A step by step:

  • Start on: A
  • Step 1: move up to Bb
  • Step 2: move up to B
  • Step 3: Land on C
Min 3rd
C
Root
A
1
2
PLAY
  • Bb is a minor second above A.
  • B is a major 2nd above A.
  • C is a minor third above A.

The b 5th

The flat fifth of an A Diminished chord is Eb. The flat fifth is down six half-steps from the Root -- but it's easier to just think of it as a variation on the fifth. Once you know your fifths, the flat fifth and sharp fifth are a lot easier to find.

Finding Eb from A step by step:

  • Start on: A
  • Step 1: move down to G#
  • Step 2: move down to G
  • Step 3: move down to F#
  • Step 4: move down to F
  • Step 5: move down to E
  • Step 6: Land on Eb
b 5th
Eb
Root
A
1
2
3
4
5
PLAY
  • G# is a minor second below A.
  • G is a major 2nd below A.
  • F# is a minor third below A.
  • F is a major third below A.
  • E is a fourth below A.
  • Eb is a flat fifth below A.

The Inversions of A Diminished

Root Position

Root
A
Min 3rd
C
b 5th
Eb
PLAY
E
G
B
D
F
F
A
C
E
A
C
Eb

1st Inversion

Min 3rd
C
b 5th
Eb
Root
A
PLAY
E
G
B
D
F
F
A
C
E
C
Eb
A

2nd Inversion

b 5th
Eb
Root
A
Min 3rd
C
PLAY
E
G
B
D
F
F
A
C
E
Eb
A
C

Other Diminished Chords

Cdim, C#dim, Dbdim, Ddim, D#dim, Ebdim, Edim, Fdim, F#dim, Gbdim, Gdim, G#dim, Abdim, Adim, A#dim, Bbdim, Bdim

See all diminished chords

Other A Chords

A, Am, Adim, A+, AM7, Am7, A7, Adim7

See a list of 34 A chords