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
x 0 2 0 2 05 7 5 6 5 5Read 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
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.
