root position: Bbdim7
B♭ – D♭ – F♭ – A𝄫
Bbdim7 Piano Chord
The B flat diminished 7 chord (B♭dim7) is made of the notes B♭, D♭, F♭ and A𝄫. Its formula is 1 – ♭3 – ♭5 – 𝄫7.
Notes in B♭dim7
| Note | Formula | Interval from root |
|---|---|---|
| B♭ | 1 | root |
| D♭ | ♭3 | minor 3rd |
| F♭ | ♭5 | diminished 5th |
| A𝄫 | 𝄫7 | diminished 7th |
How to play B♭dim7 on piano
- Right hand: fingers 1-2-3-5
- Left hand: fingers 5-3-2-1
Fingers are numbered from the thumb (1) to the little finger (5).
B♭dim7 inversions
1st inversion: Bbdim7/Db
D♭ – F♭ – A𝄫 – B♭
2nd inversion: Bbdim7/Fb
F♭ – A𝄫 – B♭ – D♭
3rd inversion: Bbdim7/Abb
A𝄫 – B♭ – D♭ – F♭
Other names for Bbdim7
B♭dim7 is also written as B♭dim7, Bb°7, B♭°7, A#dim7, A♯dim7, A#°7, A♯°7.
Keys that contain B♭dim7
B♭dim7 is not one of the basic chords of any major or minor key. It is usually used as a passing or colour chord.