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.

Key/ Chd	A	A♯/ B♭	B	C	C♯/ D♭	D	D♯/ E♭	E	F	F♯/ G♭	G	G♯/ A♭
A	I		(VII)		VI	[V]		IV		(III)
Am	i			vi		(v)		iv	iii		ii
A+										[III+]
A°		[vii°]									ii°
Key/ Chd	A	A♯/ B♭	B	C	C♯/ D♭	D	D♯/ E♭	E	F	F♯/ G♭	G	G♯/ A♭
Chd
A♯/ B♭		I		(VII)		VI	[V]		IV		(III)
A♯/ B♭m		i			vi		(v)		iv	iii		ii
A♯/ B♭+											[III+]
A♯/ B♭°			[vii°]									ii°
Key/ Chd	A	A♯/ B♭	B	C	C♯/ D♭	D	D♯/ E♭	E	F	F♯/ G♭	G	G♯/ A♭
Chd
B			I		(VII)		VI	[V]		IV		(III)
Bm	ii		i			vi		(v)		iv	iii
B+												[III+]
B°	ii°			[vii°]
Key/ Chd	A	A♯/ B♭	B	C	C♯/ D♭	D	D♯/ E♭	E	F	F♯/ G♭	G	G♯/ A♭
C	(III)			I		(VII)		VI	[V]		IV
Cm		ii		i			vi		(v)		iv	iii
C+	[III+]
C°		ii°			[vii°]
Key/ Chd	A	A♯/ B♭	B	C	C♯/ D♭	D	D♯/ E♭	E	F	F♯/ G♭	G	G♯/ A♭
C♯/ D♭		(III)			I		(VII)		VI	[V]		IV
C♯/ D♭m	iii		ii		i			vi		(v)		iv
C♯/ D♭+		[III+]
C♯/ D♭°			ii°			[vii°]
Key/ Chd	A	A♯/ B♭	B	C	C♯/ D♭	D	D♯/ E♭	E	F	F♯/ G♭	G	G♯/ A♭
D	IV		(III)			I		(VII)		VI	[V]
Dm	iv	iii		ii		i			vi		(v)
D+			[III+]
D°				ii°			[vii°]
Key/ Chd	A	A♯/ B♭	B	C	C♯/ D♭	D	D♯/ E♭	E	F	F♯/ G♭	G	G♯/ A♭
D♯/ E♭		IV		(III)			I		(VII)		VI	[V]
D♯/ E♭m		iv	iii		ii		i			vi		(v)
D♯/ E♭+				[III+]
D♯/ E♭°					ii°			[vii°]
Key/ Chd	A	A♯/ B♭	B	C	C♯/ D♭	D	D♯/ E♭	E	F	F♯/ G♭	G	G♯/ A♭
E	[V]		IV		(III)			I		(VII)		VI
Em	(v)		iv	iii		ii		i			vi
E+					[III+]
E°						ii°			[vii°]
Key/ Chd	A	A♯/ B♭	B	C	C♯/ D♭	D	D♯/ E♭	E	F	F♯/ G♭	G	G♯/ A♭
F	VI	[V]		IV		(III)			I		(VII)
Fm		(v)		iv	iii		ii		i			vi
F+						[III+]
F°							ii°			[vii°]
Key/ Chd	A	A♯/ B♭	B	C	C♯/ D♭	D	D♯/ E♭	E	F	F♯/ G♭	G	G♯/ A♭
F♯/ G♭		VI	[V]		IV		(III)			I		(VII)
F♯/ G♭m	vi		(v)		iv	iii		ii		i
F♯/ G♭+							[III+]
F♯/ G♭°								ii°			[vii°]
Key/ Chd	A	A♯/ B♭	B	C	C♯/ D♭	D	D♯/ E♭	E	F	F♯/ G♭	G	G♯/ A♭
G	(VII)		VI	[V]		IV		(III)			I
Gm		vi		(v)		iv	iii		ii		i
G+								[III+]
G°									ii°			[vii°]
Key/ Chd	A	A♯/ B♭	B	C	C♯/ D♭	D	D♯/ E♭	E	F	F♯/ G♭	G	G♯/ A♭
G♯/ A♭		(VII)		VI	[V]		IV		(III)			I
G♯/ A♭m			vi		(v)		iv	iii		ii		i
G♯/ A♭+									[III+]
G♯/ A♭°	[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