B dominant 7th · Piano
B7 Chord on Piano
The B7 chord (B dominant 7th) is built from the notes B, D#, F# and A. The keyboard diagram below shows exactly which keys to press.
Chord diagrams
Notes in this chord
- B
- D♯
- F♯
- A
Degrees: 1 – 3 – 5 – ♭7
How to play
To play B7 on piano, press B, D#, F# and A together. In root position the lowest note is B, 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 B7 this structure sits on the root B, so the degrees 1 – 3 – 5 – ♭7 map onto B, D#, F# and A.
Frequently asked questions
- Which notes are in the B7 chord?
- B7 contains the notes B, D#, F# and A. Relative to the root these are the degrees 1 – 3 – 5 – ♭7.
Practise B7 on your phone
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