Ref: Diatonic Keys for Triads

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This page shows which major, minor, and harmonic minor keys a particular triad is diatonic to. Find the chord that you want to know which keys it belongs to in the left-most column, then look for the x's on that row for all the keys.

	Major
Key/ Chd	A	A♯	B	C	C♯	D	D♯	E	F	F♯	G	G♯
A	I					V		IV
Am				vi					iii		ii
A+
Key/ Chd	A	A♯	B	C	C♯	D	D♯	E	F	F♯	G	G♯
A°		vii°
A♯		I					V		IV
A♯m					vi					iii		ii
A♯+
A♯°			vii°
Key/ Chd	A	A♯	B	C	C♯	D	D♯	E	F	F♯	G	G♯
B			I					V		IV
Bm	ii					vi					iii
B+
B°				vii°
Key/ Chd	A	A♯	B	C	C♯	D	D♯	E	F	F♯	G	G♯
C				I					V		IV
Cm		ii					vi					iii
C+
C°					vii°
Key/ Chd	A	A♯	B	C	C♯	D	D♯	E	F	F♯	G	G♯
C♯					I					V		IV
C♯m	iii		ii					vi
C♯+
C♯°						vii°
Key/ Chd	A	A♯	B	C	C♯	D	D♯	E	F	F♯	G	G♯
D	IV					I					V
Dm		iii		ii					vi
D+
D°							vii°
Key/ Chd	A	A♯	B	C	C♯	D	D♯	E	F	F♯	G	G♯
D♯		IV					I					V
D♯m			iii		ii					vi
D♯+
D♯°								vii°
Key/ Chd	A	A♯	B	C	C♯	D	D♯	E	F	F♯	G	G♯
E	V		IV					I
Em				iii		ii					vi
E+
E°									vii°
Key/ Chd	A	A♯	B	C	C♯	D	D♯	E	F	F♯	G	G♯
F		V		IV					I
Fm					iii		ii					vi
F+
F°										vii°
Key/ Chd	A	A♯	B	C	C♯	D	D♯	E	F	F♯	G	G♯
F♯			V		IV					I
F♯m	vi					iii		ii
F♯+
F♯°											vii°
Key/ Chd	A	A♯	B	C	C♯	D	D♯	E	F	F♯	G	G♯
G				V		IV					I
Gm		vi					iii		ii
G+
G°												vii°
Key/ Chd	A	A♯	B	C	C♯	D	D♯	E	F	F♯	G	G♯
G♯					V		IV					I
G♯m			vi					iii		ii
G♯+
G♯°	vii°

	Minor (Natural Only), [Harmonic Only]
Key/ Chd	A	A♯	B	C	C♯	D	D♯	E	F	F♯	G	G♯
A			(VII)		VI	[V]				(III)
Am	i					(v)		iv
A+										[III+]
A°		[vii°]									ii°
Key/ Chd	A	A♯	B	C	C♯	D	D♯	E	F	F♯	G	G♯
A♯				(VII)		VI	[V]				(III)
A♯m		i					(v)		iv
A♯+											[III+]
A♯°			[vii°]									ii°
Key/ Chd	A	A♯	B	C	C♯	D	D♯	E	F	F♯	G	G♯
B					(VII)		VI	[V]				(III)
Bm			i					(v)		iv
B+												[III+]
B°	ii°			[vii°]
Key/ Chd	A	A♯	B	C	C♯	D	D♯	E	F	F♯	G	G♯
C	(III)					(VII)		VI	[V]
Cm				i					(v)		iv
C+	[III+]
C°		ii°			[vii°]
Key/ Chd	A	A♯	B	C	C♯	D	D♯	E	F	F♯	G	G♯
C♯		(III)					(VII)		VI	[V]
C♯m					i					(v)		iv
C♯+		[III+]
C♯°			ii°			[vii°]
Key/ Chd	A	A♯	B	C	C♯	D	D♯	E	F	F♯	G	G♯
D			(III)					(VII)		VI	[V]
Dm	iv					i					(v)
D+			[III+]
D°				ii°			[vii°]
Key/ Chd	A	A♯	B	C	C♯	D	D♯	E	F	F♯	G	G♯
D♯				(III)					(VII)		VI	[V]
D♯m		iv					i					(v)
D♯+				[III+]
D♯°					ii°			[vii°]
Key/ Chd	A	A♯	B	C	C♯	D	D♯	E	F	F♯	G	G♯
E	[V]				(III)					(VII)		VI
Em	(v)		iv					i
E+					[III+]
E°						ii°			[vii°]
Key/ Chd	A	A♯	B	C	C♯	D	D♯	E	F	F♯	G	G♯
F	VI	[V]				(III)					(VII)
Fm		(v)		iv					i
F+						[III+]
F°							ii°			[vii°]
Key/ Chd	A	A♯	B	C	C♯	D	D♯	E	F	F♯	G	G♯
F♯		VI	[V]				(III)					(VII)
F♯m			(v)		iv					i
F♯+							[III+]
F♯°								ii°			[vii°]
Key/ Chd	A	A♯	B	C	C♯	D	D♯	E	F	F♯	G	G♯
G	(VII)		VI	[V]				(III)
Gm				(v)		iv					i
G+								[III+]
G°									ii°			[vii°]
Key/ Chd	A	A♯	B	C	C♯	D	D♯	E	F	F♯	G	G♯
G♯		(VII)		VI	[V]				(III)
G♯m					(v)		iv					i
G♯+									[III+]
G♯°	[vii°]									ii°

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Intervals Scales Circle of 5ths Fret Maps CAGED Charts Diatonic Chords Diatonic Keys Chord Fingerings Chord Naming Progressions Modes Counting Rhythm Arpeggios Reading Tab Other Notation Injury

Ref: Diatonic Keys for Triads

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