A Major

Symbols:A, AMaj, AM
Scale Degree Formula:1-3-5
Interval Stack:M3 + m3
Notes:A, C#, E
Hear this chord:▸ Guitar
Inversions:A/C#, A/E

Construction

Using the scale degree formula, we first start with the A major scale, and number each note in the scale starting from 1 - these are the scale degrees. Next, we use the scale degree formula, in this case 1-3-5, to select notes from our enumerated scale. When a chord requires notes that are not in the scale, this is indicated with a flat (♭) or a sharp (#) along with the scale degree; a ♭3, for instance, would be one half-step down from the 3rd scale degree.
Alternatively, we can use the interval stack to construct our chord. With this approach, we first start with the lowest note of the chord (A), then move our first interval (M3), which brings us to our second note in the chord (C#). We repeatedly apply each of the remaining intervals in the stack to get the full list of notes for our chord.
The diagram below shows how both the scale degree formula and interval stack methods result in the same selection of notes:
A1Bb♭2B2C♭3C#3D4D#♭5E5M3m3

Similar Chords

The following chords are similar to this chord and may be a suitable replacement in certain scenarios.

Chord TypeChords
Added 9thAadd9
AugmentedFaug, C#aug, Aaug
Augmented Major 7thF+Maj7
DiminishedC#dim, Bbdim
Diminished Major 7thBbdimMaj7
Dominant 7thA7
Major 2ndA2
Major 6thAM6
Major 7thAM7
Major Added 11thAadd11
MinorF#m, C#m, Am
Minor 7thF#m7
PowerchordA5
Suspended FourthEsus, Asus
Suspended SecondDsus2, Asus2

Associated Scales

This chord can be found in the following scales.

ScaleRoots
BluesF#
Blues MajorE
Blues MinorC#
DorianF#, E, B
Dorian b5G, E, B
Harmonic MajorF, D, A
Harmonic MinorD, C#
Ionian #5F, E
LocrianG#, D#, C#
Locrian bb7G#, E, C#
Locrian ♮6E, D#
LydianG, D, A
Lydian #9Bb, A
Lydian Augmented #2F, C#, Bb
Lydian b3G, D, Bb
MajorE, D, A
Major PentatonicA
MinorF#, C#, B
Minor PentatonicF#
MixolydianE, B, A
Mixolydian b2E, C, A
PhrygianG#, F#, C#
Phrygian DominantG#, A
Phrygian b4F#, C#, A
Super-Locrian bb7C#, C
SuspendedB
Ukrainian DorianG, F#

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