A augmented (Aaug) chord on guitar

The A augmented chord (Aaug) is an augmented triad (two major thirds), made of three notes: A – C♯ – E♯.

Dots show:

Easy versioneasy

Open positionmedium

Position 2medium

Position 4medium

Position 5medium

Position 7medium

Tap a string on a diagram to hear just that string. The sound is generated in your browser with a physical string model.

Chord finder Transposer Tuner

What the Aaug chord sounds like

An augmented triad is two stacked major thirds. It sounds floating, dreamlike and unresolved, and is often a passing chord (e.g. C → Caug → F or Am).

Notes of the Aaug chord

Degree	Note	Interval from the root
1	A	root
3	C♯	major third (4 semitones)
5	E♯	augmented fifth (8 semitones)

How to play it – with fingering

Easy version

String 1 (e): fret 1, index finger (E♯4)
String 2 (B): fret 2, ring finger (C♯4)
String 3 (G): fret 2, middle finger (A3)
String 4 (D): not played
String 5 (A): not played
String 6 (E): not played

Open position

String 1 (e): fret 1, index finger (E♯4)
String 2 (B): fret 2, ring finger (C♯4)
String 3 (G): fret 2, middle finger (A3)
String 4 (D): fret 3, little finger (E♯3)
String 5 (A): open (A2)
String 6 (E): not played

Position 2, barre at fret 2

String 1 (e): not played
String 2 (B): fret 2, index finger (C♯4)
String 3 (G): fret 2, index finger (A3)
String 4 (D): fret 3, middle finger (E♯3)
String 5 (A): open (A2)
String 6 (E): fret 5, little finger (A2)

For the barre, lay your index finger flat across all the marked strings at fret 2; your other fingers press the higher frets.

Tuning: E A D G B E (low to high). String 6 is the thickest, the low E. In the diagram, × means the string is not played, and a circle means an open string.

Which keys is it in?

The Aaug chord is built from the notes of these keys (for minor keys, both the natural and the harmonic minor are considered):

F♯ minor: III+

Similar chords and substitutes

If Aaug is too hard, or you want a different colour in the same spot, these chords are worth a try.

Substitutes (by function)

A – the raised fifth falls back to a perfect fifth
D – as a passing chord it resolves here (V+ → I)

Same notes

C♯aug – the same notes with a different root
Faug – the same notes with a different root

Frequently asked questions

What notes are in the Aaug chord?

A, C♯, E♯. The root is A; the intervals of the other notes from the root: major third, augmented fifth.

What is the easiest way to play Aaug on guitar?

The easiest shape above is “Easy version”, rated easy. We show 6 shapes, from open and easy versions to movable barre shapes higher up the neck.

How do I read the chord diagram?

Strings run from the lowest (left) to the highest (right) – tick “Left-handed” to mirror it. Rows are frets; a number at the side shows the starting fret. Dots are fingers (1 index, 2 middle, 3 ring, 4 little), a long bar is a barre, × means don't play that string and ○ means play it open.

How is the Aaug chord written?

The chord symbol is Aaug, and its full name is A augmented.