Chord library

A7 Chord

Guitar diagrams, the piano keys to press, the notes in the chord and the chords that sound good with it.

A7

A7 (A seventh) is built from 4 notes: A, C♯, E, G.

  • Aroot
  • C♯major third
  • Eperfect fifth
  • Gminor seventh

Formula: 1, 3, 5, b7

How to play A7 on guitar

×EADGBE
Open position
x 0 2 0 2 0
5frEADGBE
Barre on fret 5, root on the 6th string
5 7 5 6 5 5

Read the diagrams with the low E string on the left. × means do not play that string, ○ means play it open.

How to play A7 on piano

AEGC♯

Play A, C♯, E, G together. With your right hand, use fingers 1, 2, 3 and 5 (thumb on A). Your left hand can play A an octave lower for a fuller sound.

Where A7 is used

A7 is the five chord (V7) in the keys of D major and D minor. Its C♯ and G pull toward the notes of the D chord, which is why A7 so often comes right before D or Dm.

To hear the difference the seventh makes, play A and then A7. The extra G adds tension that wants to resolve.

Related chords

Change this chord into another key with the Chord Transposer, or look up any other chord or scale in the Chord and Scale Finder.