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+
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°
C				I					V		IV
Cm		ii					vi					iii
C+
C°					vii°
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°
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°
F		V		IV					I
Fm					iii		ii					vi
F+
F°										vii°
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°
G♯					V		IV					I
G♯m			vi					iii		ii
G♯+
G♯°	vii°

	Minor
Key/ Chd	A	A♯	B	C	C♯	D	D♯	E	F	F♯	G	G♯
A			VII		VI					III
Am	i					v		iv
A+
A°											ii°
A♯				VII		VI					III
A♯m		i					v		iv
A♯+
A♯°												ii°
Key/ Chd	A	A♯	B	C	C♯	D	D♯	E	F	F♯	G	G♯
B					VII		VI					III
Bm			i					v		iv
B+
B°	ii°
C	III					VII		VI
Cm				i					v		iv
C+
C°		ii°
C♯		III					VII		VI
C♯m					i					v		iv
C♯+
C♯°			ii°
Key/ Chd	A	A♯	B	C	C♯	D	D♯	E	F	F♯	G	G♯
D			III					VII		VI
Dm	iv					i					v
D+
D°				ii°
D♯				III					VII		VI
D♯m		iv					i					v
D♯+
D♯°					ii°
Key/ Chd	A	A♯	B	C	C♯	D	D♯	E	F	F♯	G	G♯
E					III					VII		VI
Em	v		iv					i
E+
E°						ii°
F	VI					III					VII
Fm		v		iv					i
F+
F°							ii°
F♯		VI					III					VII
F♯m			v		iv					i
F♯+
F♯°								ii°
Key/ Chd	A	A♯	B	C	C♯	D	D♯	E	F	F♯	G	G♯
G	VII		VI					III
Gm				v		iv					i
G+
G°									ii°
G♯		VII		VI					III
G♯m					v		iv					i
G♯+
G♯°										ii°

	Harmonic Minor
Key/ Chd	A	A♯	B	C	C♯	D	D♯	E	F	F♯	G	G♯
A					VI	V
Am	i							iv
A+										III+
A°		vii°									ii°
A♯						VI	V
A♯m		i							iv
A♯+											III+
A♯°			vii°									ii°
Key/ Chd	A	A♯	B	C	C♯	D	D♯	E	F	F♯	G	G♯
B							VI	V
Bm			i							iv
B+												III+
B°	ii°			vii°
C								VI	V
Cm				i							iv
C+	III+
C°		ii°			vii°
C♯									VI	V
C♯m					i							iv
C♯+		III+
C♯°			ii°			vii°
Key/ Chd	A	A♯	B	C	C♯	D	D♯	E	F	F♯	G	G♯
D										VI	V
Dm	iv					i
D+			III+
D°				ii°			vii°
D♯											VI	V
D♯m		iv					i
D♯+				III+
D♯°					ii°			vii°
Key/ Chd	A	A♯	B	C	C♯	D	D♯	E	F	F♯	G	G♯
E	V											VI
Em			iv					i
E+					III+
E°						ii°			vii°
F	VI	V
Fm				iv					i
F+						III+
F°							ii°			vii°
F♯		VI	V
F♯m					iv					i
F♯+							III+
F♯°								ii°			vii°
Key/ Chd	A	A♯	B	C	C♯	D	D♯	E	F	F♯	G	G♯
G			VI	V
Gm						iv					i
G+								III+
G°									ii°			vii°
G♯				VI	V
G♯m							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