Triads

A Major chord

A bright, resolved triad — the sound most people hear as 'happy'. Root, major third, perfect fifth.

Instrument

Notes in A Major

Notes and intervals of the A Major chord
Note	Interval	Semitones from root
A	Root	0
C#	Major 3rd	4
E	Perfect 5th	7

Formula: 0–4–7 semitones above the root. Move the whole shape up or down and you get the same chord in another key — that is why Major chords sound alike no matter where they start.

Other chords on A

A Minor A Diminished A Augmented A Major 7th A Minor 7th A Dominant 7th A Diminished 7th A Half-Diminished 7th

Want to hear A Major inside a progression? Load a key in the chord progression generator or browse the scales reference.

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