root position: Bm7b5
B – D – F – A
The B half-diminished 7 chord (Bm7♭5) is made of the notes B, D, F and A. Its formula is 1 – ♭3 – ♭5 – ♭7.
| Note | Formula | Interval from root |
|---|---|---|
| B | 1 | root |
| D | ♭3 | minor 3rd |
| F | ♭5 | diminished 5th |
| A | ♭7 | minor 7th |
Fingers are numbered from the thumb (1) to the little finger (5).
B – D – F – A
D – F – A – B
F – A – B – D
A – B – D – F
Bm7♭5 is also written as Bm7♭5, Bø7, Bø, Bmin7b5, Bmin7♭5, B-7b5, B-7♭5.