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B Diminished 7th Guitar Chord (Bdim7)

B Diminished 7th (Bdim7) is built from B, D, F, Ab, which is the 1P - 3m - 5d - 7d formula measured from the root B. This page shows 5 fingerings with fretboard diagrams.

Diminished
Notes: B · D · F · AbIntervals: 1P – 3m – 5d – 7d

Fingerings for Bdim7

Bdim7low E at fret 1, A at fret 2, D at fret 3, G muted, B muted, high E at fret 4
Bdim7low E muted, A at fret 1, D at fret 2, G at fret 3, B at fret 2, high E muted
Bdim7low E muted, A at fret 2, D muted, G at fret 4, B at fret 3, high E at fret 1
Bdim7low E muted, A muted, D at fret 4, G at fret 2, B at fret 1, high E at fret 2
Bdim7low E muted, A muted, D at fret 1, G at fret 2, B at fret 4, high E at fret 2

Notes in Bdim7

  • B1P
  • D3m
  • F5d
  • Ab7d

How to play Bdim7

B Diminished 7th Guitar Chord (Bdim7) is unstable and cinematic, used as a passing or tension chord.

Beginner tip

Diminished shapes move in small steps, so keep your hand relaxed and shift rather than stretch.

Practice idea

Slide it up three frets at a time and notice it repeats its own shape.

Bdim7 FAQ

What notes are in B Diminished 7th?
B Diminished 7th (Bdim7) contains B, D, F, Ab. In interval terms that is 1P - 3m - 5d - 7d above the root B.
How do you play Bdim7 on guitar?
The most common shape here is "Bdim7": low E at fret 1, A at fret 2, D at fret 3, G muted, B muted, high E at fret 4.
Is Bdim7 hard for beginners?
It sits in the diminished family. Diminished shapes move in small steps, so keep your hand relaxed and shift rather than stretch.

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