Popular fretboard positions with fingering suggestions
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B7/A is the B dominant 7th / A (3rd inversion) guitar chord with A in the bass. It uses the notes B, D♯, F♯, and A and the interval formula 1-3-5-♭7.
The B dominant 7th dominant 7th chord, formed by adding a minor seventh A to the major triad, creates tension that seeks resolution, typically to the tonic. The combination of the major third D♯ and minor seventh A provides a bluesy, soulful feel, making it essential in jazz, blues, and classical cadences. With A in the bass, this voicing functions as the 3rd inversion of B dominant 7th.
Also written as B7 and Bdom7/A.
These are quick-start shapes for players who want the answer first and the deeper theory second.
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Each note below shows how the chord is built from its root. This is the theory layer underneath the fretboard shapes.
The root anchors the chord and defines its tonal center.
This note defines the chord's major quality and brings brightness to the sound.
The fifth reinforces stability and gives the chord its strong harmonic frame.
The minor seventh adds bluesy or jazzy tension that wants to move onward.
Every shape is shown with its diagram and exact fingering instructions.
B7/A uses the notes B, D♯, F♯, and A. Its interval formula is 1-3-5-♭7.
B7/A is also written as B7 and Bdom7/A.
Place the 1st finger on the 1st fret of the 4th string. Place the 2nd finger on the 2nd fret of the 3rd string. Place the 3rd finger on the 2nd fret of the 1st string. Let the fifth and second strings ring open. Strum from the 5th string down.
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