Piano chord · Triads

A diminished chord on piano

Right hand: A (1), C (3), E♭ (5)

How to play Adim on piano: the keys to press, which fingers to use, inversions and how it’s written on the staff.

Tense and unstable — it usually wants to resolve up by a half step.

Adim is the vii° chord in B♭ major. In minor keys: ii° in G minor.

Notes
ACE♭
Formula
1♭3♭5
Built from
root · minor 3rd · diminished 5th

Piano

Root position · numbers are finger numbers

𝄞𝄢

How to play it

Right handA1 · thumbC3 · middleE♭5 · pinky

Left handA5 · pinkythe root, an octave lower

Finger numbers: 1 thumb · 2 index · 3 middle · 4 ring · 5 pinky. Inversions use the same notes with a different one on the bottom — they help you move smoothly between chords. Tap any key to hear it.

Tips for playing Adim on piano

On piano, Adim has one black key (E♭) and two white keys.

Adim piano chord diagram (A diminished)
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