Chords in the Key of B♭ Major

The key of B flat major has 2 flats (B♭, E♭). Its scale is B♭ – C – D – E♭ – F – G – A, and its chords are B♭, Cm, Dm, E♭, F, Gm, Adim.

The B♭ major scale.

Chords in B♭ major

Degree	Chord	Seventh chord	Notes
I	B♭	B♭maj7 Imaj7	B♭ – D – F
ii	Cm	Cm7 ii7	C – E♭ – G
iii	Dm	Dm7 iii7	D – F – A
IV	E♭	E♭maj7 IVmaj7	E♭ – G – B♭
V	F	F7 V7	F – A – C
vi	Gm	Gm7 vi7	G – B♭ – D
vii°	Adim	Am7♭5 viiø7	A – C – E♭

Common chord progressions in B♭ major

I – IV – V – I: B♭ – E♭ – F – B♭
I – V – vi – IV: B♭ – F – Gm – E♭
ii – V – I: Cm – F – B♭
I – vi – IV – V: B♭ – Gm – E♭ – F

Related keys

G minor (relative minor, same notes)
B♭ minor (parallel minor, same starting note)
F major (dominant key, a fifth up)
E♭ major (subdominant key, a fifth down)