Playing the Bdim7 Guitar Chord
The Bdim7 chord is a diminished 7th chord built on the root B. It contains 4 notes: B, D, F, G#. On guitar, this chord can be played in multiple positions across the fretboard, from open shapes to barre chord voicings.
Four notes stacked in minor thirds. Extremely tense, used as a passing chord. For guitarists, mastering the Bdim7 chord unlocks many songs in the key of B.
Recommended Bdim7 Guitar Voicing
The interactive fretboard above shows a practical Bdim7 voicing. The chord notes (B, D, F, G#) appear as highlighted positions. Tap any highlighted fret to hear that note, or click "Play Bdim7" to hear the full chord.
Interval Structure of Bdim7
| Degree | Interval | Semitones | Note in B |
|---|---|---|---|
| Root | Root (R) | 0 | B |
| 3rd | Minor 3rd | 3 | D |
| 5th | Tritone | 6 | F |
| 7th | Major 6th | 9 | G# |
Common Progressions with Bdim7 on Guitar
- I–IV–V: Bdim7 – Edim7 – F#dim7 (foundation of blues and rock)
- I–V–vi–IV: Bdim7 – F# – G#m – E (modern pop staple)
- I–vi–IV–V: Bdim7 – G#m – E – F# (50s doo-wop)
Tips for Practicing Bdim7 on Guitar
Start by finding the root note B on the 6th and 5th strings. Build the chord shape from there. Practice transitioning between Bdim7 and nearby chords like E and F#. Use slow, deliberate strums and check each string rings clearly.