A° chord on 6-String Guitar – Open Am

in Open Am (E-A-E-A-C-E) tuning

Root

Type

Tuning

A°

Diminished

Notes:A · C · D#

mediumfret 3

Piano Left hand Right hand

Fingerings (16)

A° shapes as text

Frets	Fingers	Notes	Difficulty
x 0 5 3 3 5	– – 3 1 2 4	x A A C D# A	medium
5 3 5 3 3 5	2 1 3 1 1 4	A C A C D# A	medium · barre on fret 3
5 6 5 6 0 x	1 2 1 3 – –	A D# A D# C x	easy · barre on fret 5
8 0 8 6 0 8	2 – 3 1 – 4	C A C D# C C	medium
11 0 8 12 9 8	3 – 1 4 2 1	D# A C A A C	hard · barre on fret 8
x 12 11 12 12 11	– 2 1 3 4 1	x A D# A C D#	medium · barre on fret 11
5 0 5 3 3 x	3 – 4 1 2 –	A A A C D# x	medium
5 3 5 3 3 x	2 1 3 1 1 –	A C A C D# x	medium · barre on fret 3
5 6 5 0 0 x	1 2 1 – – –	A D# A A C x	easy · barre on fret 5
x 0 8 6 0 8	– – 2 1 – 3	x A C D# C C	medium
11 0 8 12 12 8	2 – 1 3 4 1	D# A C A C C	hard · barre on fret 8
x 0 11 12 12 11	– – 1 2 3 1	x A D# A C D#	easy · barre on fret 11
5 3 5 0 3 x	3 1 4 – 2 –	A C A A D# x	medium
5 3 5 6 3 x	2 1 3 4 1 –	A C A D# D# x	medium · barre on fret 3
5 0 5 6 0 5	1 – 2 4 – 3	A A A D# C A	medium
8 0 8 6 0 x	2 – 3 1 – –	C A C D# C x	medium

Max fret: 12

Fingerings shown: 16

The A° chord (Diminished) is built from the notes A, C, D#. Below are playable fingerings for 6-String Guitar – Open Am generated for your selected tuning, ordered from open-position shapes up the neck. Tap a diagram to hear it, or switch to the piano view to see the same harmony on keys.

How the A° chord is built

Formula: 1 · ♭3 · ♭5

Degree	Semitones	Note
1	0	A
♭3	3	C
♭5	6	D#

More A chords

A Am A7 A+A9 Amaj7 Am7 A7♯5 A7♭5 A6 Am6 Am7♭5 A°7 Asus2 Asus4 Aadd9 Amaj9 Am9 A5

Other roots

C°C#°D°D#°E°F°F#°G°G#°A#°B°

See A° in another tuning

Standard E E-A-D-G-B-E Half Step Down (Eb) D#-G#-C#-F#-A#-D#Drop D D-A-D-G-B-E Open D D-A-D-F#-A-D Open G D-G-D-G-B-D Open Am E-A-E-A-C-E DADGAD (D Modal) D-A-D-G-A-D

What notes make up the A° chord?

A° is a Diminished chord built from the notes A, C, D#.

How do I read the diagram?

Strings run left to right from the lowest to the first string; the numbers show which finger presses each fret. An ○ marks an open string, an ✕ marks a muted one.