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A Dominant 7th Chord (A7)

Notes: A, C♯, E, G. Tap any diagram to hear it.

A7
Notes
AC♯EG
Formula
1 – 3 – 5 – ♭7

A7 on guitar

Open position · most common
x-0-2-0-2-0
Fret 5
5-7-5-6-5-5
Fret 8
x-0-11-9-8-9

Strings from low (left) to high (right). Numbers are fingers: 1 index, 2 middle, 3 ring, 4 pinky. × = don’t play, ○ = open string.

A7 on ukulele

Open position · most common
0-1-0-0
Fret 4
0-4-5-4
Fret 7
0-9-9-7

A7 on piano

Other A chords

AAmAmaj7Am7Asus2Asus4AdimAaugA6Am6A9Aadd9A7sus4Am7♭5Adim7

Dominant 7th chords in other keys

C7C♯7D7E♭7E7F7F♯7G7A♭7B♭7B7

About the A Dominant 7th chord

Dominant seventh chords add tension that wants to resolve, usually to the chord a fifth below. They are essential in blues, jazz and rock. A7 is built from the root (A), major third (C♯), perfect fifth (E), minor seventh (G).

Frequently asked questions

What notes are in the A Dominant 7th chord?

The A7 chord is made of A, C♯, E, G: the root, major third, perfect fifth, minor seventh.

How do you play A7 on guitar?

The most common fingering is x-0-2-0-2-0, from the low E string to the high E string (x = don’t play that string, 0 = open string).

How do you play A7 on piano?

Press A, C♯, E, G together. In root position the lowest note is A.