B diminished chord (Bdim) on guitar and piano

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B diminished
The B diminished chord (Bdim) is made of the notes B, D and F. It is built from the root B with a minor third and a diminished fifth.
The diminished chord is unstable and tense: it is mostly used as a passing chord between two other chords.

B diminished

Notes: B – D – F
Guitar — positions on the neck
Bdim××1243Bdim××71231Bdim××91243
Piano — root position and inversions
BdimC135B D FBdimC125D F BBdimC135F B D

Fingerings and positions

On guitar, this chord can be played in 3 ways along the neck. It is most often played with a barre. Example fingering (from the low E string to the high E string, x = muted string): x2343x. On piano, the right hand plays 3 notes, in root position or in an inversion.

Notes and intervals

Note
Interval
B
root
D
minor third
F
diminished fifth
In which keys? The B diminished chord is the vii° of C major and the ii° of A minor.

Neighbouring chords

Try it in the app

Hear the chords, play them as a progression, switch instrument, note names (Do Ré Mi or C D E) and theme:

Frequently asked questions

What are the notes of the B diminished chord?

The notes of the B diminished chord (Bdim) are B, D and F.

How do you play the B diminished chord on guitar?

On guitar, this chord can be played in 3 ways along the neck. It is most often played with a barre. Example fingering (from the low E string to the high E string, x = muted string): x2343x.

How is the B diminished chord built?

The B diminished chord (Bdim) is made of the notes B, D and F. It is built from the root B with a minor third and a diminished fifth.