B♭ Major Scale

Scale steps
W = 2 semitones H = 1 semitone
B♭2WC2WD1HE♭2WF2WG2WA1HB♭
Step Pattern: W–W–H–W–W–W–H (2–2–1–2–2–2–1 semitones)
On the keyboard
CDFGACDFGACE♭B♭E♭B♭

Diatonic triads

Degree
Build the chord · root–3rd–5th

ROOTTAKESKIP

Chord semitone gaps
Ukulele G-C-E-A
I
B♭CDE♭F
B♭ major

B♭ · D · F

4 + 3 semitones
B♭DFB♭
4312
3211
xDFB♭
312
x211 · ALT
ii
CDE♭FG
Cm minor

C · E♭ · G

3 + 4 semitones
GE♭GC
123
0333
GE♭xC
12
03x3 · ALT
iii
DE♭FGA
Dm minor

D · F · A

3 + 4 semitones
ADFA
231
2210
xDFA
21
x210 · ALT
IV
E♭FGAB♭
E♭ major

E♭ · G · B♭

4 + 3 semitones
GE♭GB♭
231
0331
B♭E♭GB♭
2341
3331 · ALT
V
FGAB♭C
F major

F · A · C

4 + 3 semitones
ACFA
21
2010
ACFC
213
2013 · ALT
vi
GAB♭CD
Gm minor

G · B♭ · D

3 + 4 semitones
GDGB♭
231
0231
B♭DGB♭
3241
3231 · ALT
vii°
AB♭CDE♭
Adim diminished

A · C · E♭

3 + 3 semitones
AE♭xC
123
23x3