Bø7
Sevenths · B root
Bø7
Also called min7♭5. The ii° in minor key ii-V-I progressions.
0 st3 st6 st10 st
Notes in Bø7
BRoot
D3rd
F5th
A7th
B is less common as a home key but appears often as the III or VII chord in various progressions.
Identify the Chord Quality on B
Each chord below is played on B. Listen and identify whether you heard Bø7, Bm, B7, or another quality — the hardest and most useful ear training skill.
Half Diminished in All 12 Keys
Other Chords in B
Related Sevenths
About the Bø7 Chord
The Bø7 chord is a half diminished chord built on B. It contains the notes B, D, F, A — the root, third, fifth, and seventh.
Also called min7♭5. The ii° in minor key ii-V-I progressions. Practising the Bø7 chord across different voicings and contexts builds the harmonic recognition that lets you identify it instantly in any musical setting — whether in a band mix, a recording, or a live performance.