Chord · 7ths
Bdim7 — B Diminished 7th
Bdim7 is the B diminished 7th chord. It is built on the root B with minor 3rd (D), diminished 5th (F) and diminished 7th (A♭) above it — the formula 1 ♭3 ♭5 𝄫7, sounding the notes B D F A♭. On the piano it sits at B (octave 3) and above in the library's voicing; the same 4 notes in any octave are still Bdim7.
- Root
- B
- Quality
- Diminished 7th
- Formula
- 1 ♭3 ♭5 𝄫7
- Notes
- B D F A♭
On the keyboard
Right-hand fingering for this voicing: 1–2–3–5 (1 is the thumb).
The notes of Bdim7
| Degree | Note | Interval from the root | Pitch |
|---|---|---|---|
| 1 | B | root | B3 |
| ♭3 | D | minor 3rd | D4 |
| ♭5 | F | diminished 5th | F4 |
| 𝄫7 | A♭ | diminished 7th | A♭4 |
Other 7ths on B
Diminished 7th chords on every root
Part of the chord reference. See also the scales and the keys.