A Major 9 (Amaj9) Chord Guitar

A bright major 9th anchored by the open A string.

A full five-tone major 9th (1-3-5-7-9) anchored by the open A.
A lush upgrade to a plain A major.
Turns a simple strummed part into something that sounds like a record.
The sophisticated, floating quality of jazz and dream-pop.

Root9th3rd5th7th

E6th

FretMuted

Finger—

A5th

FretOpen

FingerOpen

D4th

Fret2

Finger1

G3rd

Fret4

Finger3

B2nd

Fret2

Finger1

e1st

Fret4

Finger4

Notes: A – E – B – C# – G# · Formula: 1 – 3 – 5 – 7 – 9

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Load A Major 9 (Amaj9) onto an interactive fretboard, hear every note, and build it into a progression.

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Questions about A Major 9 (Amaj9)

What notes are in a A Major 9 (Amaj9) chord?

A A Major 9 (Amaj9) chord contains the notes A, E, B, C#, G#. It is built from the major 9th formula 1 - 3 - 5 - 7 - 9, with A as the root.

Is Amaj9 a major or dominant chord?

Amaj9 is a major chord — it contains a major 7th (G♯), which gives it a lush, resolved sound. That's different from A9 (dominant 9th), which has a flat 7th (G) and sounds tense and bluesy. The 'maj' in maj9 always refers to that major 7th, not just the 3rd.

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