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 3 fingerings with fretboard diagrams.
Fingerings for Bdim7
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 muted, A open, D at fret 1, G at fret 2, B at fret 1, high E at fret 2.
- 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.