Key of A

Everything on this site that is rooted on A: the twenty scales and modes, the twenty-three chord qualities, the seven chords that belong to the key, the capo positions that produce it from an open shape, the tunings whose home note it is, and the fretboard maps.

Key signature: A major · F# C# G#
Notes of A major: A B C# D E F# G#
Degrees of A major: 1 2 3 4 5 6 7
Relative minor: F# minor — the same notes, tonic on the sixth degree
Notes of A natural minor: A B C D E F G
Relative major: C major
A fifth above (dominant): E
A fourth above (subdominant): D
Tunings rooted here: Drop A, Open A
Capo positions with open shapes: capo 2 → G shapes · capo 5 → E shapes · capo 7 → D shapes · capo 9 → C shapes · capo 12 → A shapes

Chords that belong to the key

The seven triads built on the major scale, and the seventh chord on each degree.

Numeral	Triad	Notes	Triad page	Seventh	Seventh page
I	A	A C# E	A	Amaj7	Amaj7
ii	Bm	B D F#	Bm	Bm7	Bm7
iii	C#m	C# E G#	C#m	C#m7	C#m7
IV	D	D F# A	D	Dmaj7	Dmaj7
V	E	E G# B	E	E7	E7
vi	F#m	F# A C#	F#m	F#m7	F#m7
vii°	G#dim	G# B D	G#dim	G#m7b5	G#m7b5

Numeral

Triad

Notes

Triad page

Seventh

Seventh page

A C# E

Amaj7

B D F#

Bm7

iii

C#m

C# E G#

C#m

C#m7

D F# A

Dmaj7

E G# B

F#m

F# A C#

F#m

F#m7

vii°

G#dim

G# B D

G#dim

G#m7b5

Scales and modes on A

All twenty scales on this site, set out on the same root.

Scale	Page	Degrees	Notes
Major	A major	1 2 3 4 5 6 7	A B C# D E F# G#
Ionian	A ionian	1 2 3 4 5 6 7	A B C# D E F# G#
Dorian	A dorian	1 2 b3 4 5 6 b7	A B C D E F# G
Phrygian	A phrygian	1 b2 b3 4 5 b6 b7	A Bb C D E F G
Lydian	A lydian	1 2 3 #4 5 6 7	A B C# D# E F# G#
Mixolydian	A mixolydian	1 2 3 4 5 6 b7	A B C# D E F# G
Natural minor	A natural minor	1 2 b3 4 5 b6 b7	A B C D E F G
Aeolian	A aeolian	1 2 b3 4 5 b6 b7	A B C D E F G
Locrian	A locrian	1 b2 b3 4 b5 b6 b7	A Bb C D Eb F G
Harmonic minor	A harmonic minor	1 2 b3 4 5 b6 7	A B C D E F G#
Melodic minor (ascending)	A melodic minor (ascending)	1 2 b3 4 5 6 7	A B C D E F# G#
Major pentatonic	A major pentatonic	1 2 3 5 6	A B C# E F#
Minor pentatonic	A minor pentatonic	1 b3 4 5 b7	A C D E G
Blues scale	A blues scale	1 b3 4 b5 5 b7	A C D Eb E G
Phrygian dominant	A phrygian dominant	1 b2 3 4 5 b6 b7	A Bb C# D E F G
Lydian dominant	A lydian dominant	1 2 3 #4 5 6 b7	A B C# D# E F# G
Whole tone	A whole tone	1 2 3 #4 #5 b7	A B C# D# E# F##
Diminished (half-whole)	A diminished (half-whole)	1 b2 b3 3 #4 5 6 b7	A Bb C C# D# E F# G
Diminished (whole-half)	A diminished (whole-half)	1 2 b3 4 b5 b6 6 7	A B C D Eb F F# G#
Chromatic	A chromatic	1 2 3 4 5 6 7 8 9 10 11 12	A A# B C C# D D# E F F# G G#

Scale

Page

Degrees

Notes

Major

A major

1 2 3 4 5 6 7

A B C# D E F# G#

Ionian

A ionian

1 2 3 4 5 6 7

A B C# D E F# G#

Dorian

A dorian

1 2 b3 4 5 6 b7

A B C D E F# G

Phrygian

A phrygian

1 b2 b3 4 5 b6 b7

A Bb C D E F G

Lydian

A lydian

1 2 3 #4 5 6 7

A B C# D# E F# G#

Mixolydian

A mixolydian

1 2 3 4 5 6 b7

A B C# D E F# G

Natural minor

A natural minor

1 2 b3 4 5 b6 b7

A B C D E F G

Aeolian

A aeolian

1 2 b3 4 5 b6 b7

A B C D E F G

Locrian

A locrian

1 b2 b3 4 b5 b6 b7

A Bb C D Eb F G

Harmonic minor

A harmonic minor

1 2 b3 4 5 b6 7

A B C D E F G#

Melodic minor (ascending)

A melodic minor (ascending)

1 2 b3 4 5 6 7

A B C D E F# G#

Major pentatonic

A major pentatonic

1 2 3 5 6

A B C# E F#

Minor pentatonic

A minor pentatonic

1 b3 4 5 b7

A C D E G

Blues scale

A blues scale

1 b3 4 b5 5 b7

A C D Eb E G

Phrygian dominant

A phrygian dominant

1 b2 3 4 5 b6 b7

A Bb C# D E F G

Lydian dominant

A lydian dominant

1 2 3 #4 5 6 b7

A B C# D# E F# G

Whole tone

A whole tone

1 2 3 #4 #5 b7

A B C# D# E# F##

Diminished (half-whole)

A diminished (half-whole)

1 b2 b3 3 #4 5 6 b7

A Bb C C# D# E F# G

Diminished (whole-half)

A diminished (whole-half)

1 2 b3 4 b5 b6 6 7

A B C D Eb F F# G#

Chromatic

A chromatic

1 2 3 4 5 6 7 8 9 10 11 12

A A# B C C# D D# E F F# G G#

Chords on A

All twenty-three chord qualities on this site, set out on the same root.

Chord	Page	Degrees	Notes	Quality
A	A	1 3 5	A C# E	Major
Am	Am	1 b3 5	A C E	Minor
Adim	Adim	1 b3 b5	A C Eb	Diminished
Aaug	Aaug	1 3 #5	A C# E#	Augmented
Asus2	Asus2	1 2 5	A B E	Suspended second
Asus4	Asus4	1 4 5	A D E	Suspended fourth
Amaj7	Amaj7	1 3 5 7	A C# E G#	Major seventh
Am7	Am7	1 b3 5 b7	A C E G	Minor seventh
A7	A7	1 3 5 b7	A C# E G	Dominant seventh
Am7b5	Am7b5	1 b3 b5 b7	A C Eb G	Half-diminished seventh
Adim7	Adim7	1 b3 b5 bb7	A C Eb Gb	Diminished seventh
A6	A6	1 3 5 6	A C# E F#	Sixth
Am6	Am6	1 b3 5 6	A C E F#	Minor sixth
Aadd9	Aadd9	1 9 3 5	A B C# E	Added ninth
A9	A9	1 9 3 5 b7	A B C# E G	Dominant ninth
Am9	Am9	1 9 b3 5 b7	A B C E G	Minor ninth
Amaj9	Amaj9	1 9 3 5 7	A B C# E G#	Major ninth
A11	A11	1 9 3 11 5 b7	A B C# D E G	Dominant eleventh
Am11	Am11	1 9 b3 11 5 b7	A B C D E G	Minor eleventh
A13	A13	1 9 3 5 13 b7	A B C# E F# G	Dominant thirteenth
A7sus4	A7sus4	1 4 5 b7	A D E G	Dominant seventh suspended fourth
A7b5	A7b5	1 3 b5 b7	A C# Eb G	Dominant seventh flat five
A7#9	A7#9	1 3 5 b7 #9	A C# E G B#	Dominant seventh sharp nine

Chord

Page

Degrees

Notes

Quality

1 3 5

A C# E

Major

1 b3 5

A C E

Minor

Adim

1 b3 b5

A C Eb

Diminished

Aaug

1 3 #5

A C# E#

Augmented

Asus2

1 2 5

A B E

Suspended second

Asus4

1 4 5

A D E

Suspended fourth

Amaj7

1 3 5 7

A C# E G#

Major seventh

Am7

1 b3 5 b7

A C E G

Minor seventh

1 3 5 b7

A C# E G

Dominant seventh

Am7b5

1 b3 b5 b7

A C Eb G

Half-diminished seventh

Adim7

1 b3 b5 bb7

A C Eb Gb

Diminished seventh

1 3 5 6

A C# E F#

Sixth

Am6

1 b3 5 6

A C E F#

Minor sixth

Aadd9

1 9 3 5

A B C# E

Added ninth

1 9 3 5 b7

A B C# E G

Dominant ninth

Am9

1 9 b3 5 b7

A B C E G

Minor ninth

Amaj9

1 9 3 5 7

A B C# E G#

Major ninth

A11

1 9 3 11 5 b7

A B C# D E G

Dominant eleventh

Am11

1 9 b3 11 5 b7

A B C D E G

Minor eleventh

A13

1 9 3 5 13 b7

A B C# E F# G

Dominant thirteenth

A7sus4

1 4 5 b7

A D E G

Dominant seventh suspended fourth

A7b5

1 3 b5 b7

A C# Eb G

Dominant seventh flat five

A7#9

1 3 5 b7 #9

A C# E G B#

Dominant seventh sharp nine

Fretboard maps

Map	Page	Contents
A major	note map	every position to fret 22 as note names
A degrees	degree map	the same positions as degrees of the major and natural minor scales
All keys	index	the twelve key maps and the chromatic reference

Map

Page

Contents

A major

note map

every position to fret 22 as note names

A degrees

degree map

the same positions as degrees of the major and natural minor scales

All keys

index

the twelve key maps and the chromatic reference

Related keys

RelativeKey of F#shares every note with A
ParallelA natural minorthe same tonic, a different third, sixth and seventh
DominantKey of Ea fifth above A; its tonic chord is the dominant of this key
SubdominantKey of Da fourth above A; its tonic chord is the fourth chord of this key
CircleCircle of fifthswhere A sits relative to the other eleven keys
SignatureKey signaturesthe accidentals of every key, including the enharmonic spellings
CapoCapo charthow to reach A with open shapes

All twelve keys: C · C# · D · Eb · E · F · F# · G · Ab · A · Bb · B

ScaleA major7 notes · 1 2 3 4 5 6 7
ScaleA natural minor7 notes · 1 2 b3 4 5 b6 b7
Neck mapA — note mapA major · frets 0–22 · A B C# D E F# G#
DegreesA — degree mapA major and natural minor · frets 0–22
ChordA — Major1 3 5 · A C# E
ChordAm7 — Minor seventh1 b3 5 b7 · A C E G
KeyKey of F#F# G# A# B C# D# E# · F# major / D# minor
HubScales and modes12 roots × 20 scales
HubChords12 roots × 23 qualities
CapoCapo chart12 capo positions × 24 target keys

Section: Atlas · Theory Atlas