A dominant 7th · Piano
A7 Chord on Piano
The A7 chord (A dominant 7th) is built from the notes A, C#, E and G. The keyboard diagram below shows exactly which keys to press.
Chord diagrams
Notes in this chord
- A
- C♯
- E
- G
Degrees: 1 – 3 – 5 – ♭7
How to play
To play A7 on piano, press A, C#, E and G together. In root position the lowest note is A, and the finger numbers follow the keys left to right in the diagram.
Theory behind the chord
Dominant seventh chords add a minor seventh on top of a major triad. The tension between the third and the seventh is what makes them pull towards the chord a fourth above — the engine of blues and jazz turnarounds. On A7 this structure sits on the root A, so the degrees 1 – 3 – 5 – ♭7 map onto A, C#, E and G.
Frequently asked questions
- Which notes are in the A7 chord?
- A7 contains the notes A, C#, E and G. Relative to the root these are the degrees 1 – 3 – 5 – ♭7.
Practise A7 on your phone
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