Bdim7 guitar chord
How to play Bdim7 on guitar — the notes B, D, F, A♭, a shape you can tap to hear, the keys it lives in, and a progression to hear it in context. Free.
The shape
Tap the diagram to hear Bdim7 strummed. Bdim7 is played as a barre chord around fret 2: lay a finger across the strings at that fret and build the shape on top. Movable, so the same grip works up and down the neck.
The notes in Bdim7
A diminished seventh chord is spelled from its root up: B (R), D (♭3), F (♭5), A♭ (♭♭7). Those are the only notes in Bdim7 — play them in any order, in any octave, and it's still Bdim7.
What a diminished seventh chord is
In plain terms, a diminished 7th stacks three minor thirds (root, ♭3, ♭5, ♭♭7) — perfectly symmetrical, so it can pivot to almost any key.
How it's used: A slippery passing chord: because every note is a minor third apart, one shape covers four different roots, and it can lead almost anywhere.
The sound: Maximum tension, mysterious, cinematic — the classic 'something's coming' chord. Where you'll hear it: Jazz passing chords, silent-film suspense, neoclassical metal, gypsy jazz.
Other B chords
diminished seventh chords on other roots
Chords and their spellings are shared facts of music theory. Every diagram and sound here is generated by ThunderFret's own engine — no tabs, lyrics or recordings are reproduced.
Open Bdim7 in the interactive tool to see every place it sits on the neck, hear it, and find the shape that fits your hand — free.
See Bdim7 on the fretboardFrequently asked
What notes are in Bdim7?
Bdim7 is made of 4 notes: B (the R), D (the ♭3), F (the ♭5), A♭ (the ♭♭7).
How do you play Bdim7 on guitar?
Bdim7 is played as a barre chord around fret 2: lay a finger across the strings at that fret and build the shape on top. Movable, so the same grip works up and down the neck.
When would I use Bdim7?
Jazz passing chords, silent-film suspense, neoclassical metal, gypsy jazz.