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B° Chord on Guitar

B° is the B diminished chord — 3 notes (B, D, F) built from the formula 1 ♭3 ♭5. Below are playable shapes across the fretboard, the keys it belongs to and the scales to use when soloing over it.

Notes: B · D · FFormula: 1 · ♭3 · ♭5Hear it and see it on the fretboard ▸

B°: Chord shapes (open & barre)

  • B° – open position×R♭3RR♭5open position
  • B° – fret 2×R♭5R♭3×fret 2
  • B° – fret 66××R♭3♭5Rfret 6
  • B° – fret 99××R♭5R♭3fret 9

B°: Triad voicings (3 strings)

  • B° – bass: R3R♭3♭5×××bass: R
  • B° – bass: R10×R♭3♭5××bass: R
  • B° – bass: R6××R♭3♭5×bass: R
  • B° – bass: R×××R♭3♭5bass: R
  • B° – bass: ♭38♭3♭5R×××bass: ♭3
  • B° – bass: ♭3×♭3♭5R××bass: ♭3
  • B° – bass: ♭310××♭3♭5R×bass: ♭3
  • B° – bass: ♭36×××♭3♭5Rbass: ♭3
  • B° – bass: ♭512♭5R♭3×××bass: ♭5
  • B° – bass: ♭57×♭5R♭3××bass: ♭5
  • B° – bass: ♭5××♭5R♭3×bass: ♭5
  • B° – bass: ♭510×××♭5R♭3bass: ♭5

Keys that contain B°

Scales to play over B°

Ordered from the most common choice. All of them contain B, D, F.

Other B chords

Triads

Sevenths

Sixths

Added

Extended

Diminished chords in other keys

FAQ

What notes are in the B° chord?
B° (B diminished) contains B, D, F — formula 1 ♭3 ♭5.
How do you play B° on guitar?
A common shape is x20401 (low E to high E, x = muted string, open position). This page shows more shapes, drop 2, drop 3 and shell voicings in the interactive library.
What scale goes with B°?
Good choices to solo over B°: B Locrian, B Diminished (whole-half), B Blues.
What key is B° in?
B° is diatonic in C major (vii°), A minor (ii°).