Triads
Chord Symbol (in C)
Chord Symbol (in Bb)
Formula
(from the scale)
notes in chord
(key of C)
notes in chord
(key of Bb)
Alternate Symbols
(in Bb)
 MajorCBb1-3-5C - E - GBb - D - F 
 MinorCmBbm1-b3-5C - Eb - GBb - Db - FBb-
 DiminishedBb º1-b3-b5C-Eb-GbBb-Db-FbBb dim
 AugmentedC + Bb +1-3-#5C-E-G#Bb-D-F#Bb aug
        


 Four-note
chords
Chord Symbol
(in C)
Chord Symbol (in Bb)
Formula
(from the scale)
notes in chord
(key of C)
notes in chord
(key of Bb)
Alternate Symbols
(in Bb)
 Major Sixth C6Bb61-3-5-6C - E - G - BBb - D - F - A 
 Minor Sixth Cm6Bbm61-b3-5-6C - Eb-G - ABb - Db - FBb-6
 Major 7th Cmaj7Bbmaj71-3-5-7C - E - G - BBb - D - F - ABb ma7
 7th (dominant) C7Bb71-3-5-b7C - E - G - BbBb - D - F - Ab 
 Minor 7th Cm7Bbm71-b3-5-b7C - Eb -G - BbBb - Db - F - AbBb-7
 Minor 7 flat 5Cm7b5Bbm7b51-b3-b5-b7C - Eb-Gb - BbBb - Db- Fb - AbBb
 Minor-major 7th Cmin-maj7Bbmin-maj71-b3-5-7C - Eb -G - BBb - Db - F - ABb mi-ma7
 Diminished 7th Cº7Bbº71-b3-b5-bb7C- Eb- Gb - ABb - Db- Fb - AbbBb dim 7
 Augmented 7th C+7Bb+71-3-#5-b7C - E - G# - BbBb - D - F# - AbBb aug 7