A7
A7 (A Dominant 7th) is common in blues and country. It consists of A, C#, E, and G notes.
Guitar Fretboard
Piano Keys
C
D
E
F
G
A
B
Notes: A - C# - E - G
Try Another Chord
Related Seventh Chords
How to Play A7 Chord
The A7 chord is made up of the notes A, C#, E, G. On guitar, this chord uses the fingering pattern shown above, where "X" means don't play that string and "O" means play the open string.
On piano, simply press the A, C#, E, G keys simultaneously. The visual diagram above highlights exactly which keys to press.