Chord formation

Chord	Numbers
Major	1 – 3 – 5
Minor	1 – b3 – 5
Augmented	1 – 3 – #5
Diminished	1 – b3 – b5
Major 7	1 – 3 – 5 – 7
Dominant 7	1 – 3 – 5 – b7
Minor 7	1 – b3 – 5 – b7
Half-Diminished 7	1 – b3 – b5 – b7
Diminished 7	1 – b3 – b5 – bb7

C scale

C –	D –	E –	F –	G –	A –	B –	C
Do –	Re –	Mi –	Fa –	So –	La –	Ti –	Do
1	2	3	4	5	6	7	1

Chords for each scale

C major	D minor	E minor	F major	G major	A minor	B diminished
C minor	D diminished	Eb major	F minor	G minor	Ab major	Bb major
C# major	D# major	E# minor	F# major	G# major	A# minor	B# diminished
C# minor	D# diminished	E major	F# minor	G# minor	A major	B major
Db major	Eb minor	F minor	Gb major	Ab major	Bb minor	C diminished
D major	E minor	F# minor	G major	A major	B minor	C# diminished
D minor	E diminished	F major	G minor	A minor	Bb major	C major
D# minor	E# diminished	F# major	G# minor	A# minor	B major	C# major
Eb major	F minor	G minor	Ab major	Bb major	C minor	D diminished
Eb minor	F diminished	Gb major	Ab minor	Bb minor	Cb major	Db major
E major	F# minor	G# minor	A major	B major	C# minor	D# diminished
E minor	F# diminished	G major	A minor	B minor	C major	D major
F major	G minor	A minor	Bb major	C major	D minor	E diminished
F minor	G diminished	Ab major	Bb minor	C minor	Db major	Eb major
F# major	G# minor	A# minor	B major	C# major	D# minor	E# diminished
F# minor	G# diminished	A major	B minor	C# minor	D major	E major
Gb major	Ab minor	Bb minor	Cb major	Db major	Eb minor	F diminished
G major	A minor	B minor	C major	D major	E minor	F# diminished
G minor	A diminished	Bb major	C minor	D minor	Eb major	F major
G# minor	A# diminished	B major	C# minor	D# minor	E major	F# major
Ab major	Bb minor	C minor	Db major	Eb major	F minor	G diminished
Ab minor	Bb diminished	Cb major	Db minor	Eb minor	Fb major	Gb major
A major	B minor	C# minor	D major	E major	F# minor	G# diminished
A minor	B diminished	C major	D minor	E minor	F major	G major
A# minor	B# major	C# minor	D# minor	E# minor	F# major	G# major
Bb major	C minor	D minor	Eb major	F major	G minor	A diminished
Bb minor	C diminished	Db major	Eb minor	F minor	Gb major	Ab major
B major	C# minor	D# minor	E major	F# major	G# minor	A# diminished
B minor	C# diminished	D major	E minor	F# minor	G major	A major

Chords

Chord	Note 1	Note 2	Note 3	Note 4
Major	1	3	5
Minor	1	b3	5
Augmented	1	3	#5
Diminished	1	b3	b5
Major 7	1	3	5	7
Dominant 7	1	3	5	b7
Minor 7	1	b3	5	b7
Half-Diminished 7	1	b3	b5	b7
Diminished 7	1	b3	b5	bb7