A major ninth piano chord - Amaj9

The A major ninth chord is a 5-note chord consisting of the notes A, C#, E, G# and B.
You can see these notes highlighted in the interactive piano chart below.
The chord itself is often abbreviated as Amaj9.

Interactive piano diagram for the A major ninth chord

Piano keyboard displaying the A major ninth chord with the notes AFbECbBC#DbG#Ab

Extended Chords

Chords that are a superset of Amaj9. The chords include more notes but always A, C#, E, G# and B.

Reduced chords

Chords that are a subset of Amaj9. These contain less notes but all of them are included in Amaj9.

Scales with Amaj9

Below you find all scales that include Amaj9:

  • lydian
  • harmonic major
  • major
  • bebop
  • bebop major
  • ichikosucho
  • messiaen's mode #3
  • chromatic

A major ninth piano chord chart image

In case you prefer a non-interactive variant of the chord chart, we've embedded a PNG image below that shows the notes for the the Amaj9 chord. Feel free to save or share the image as needed.

Piano chord chart for the A major ninth chord (Amaj9). The notes A, C#, E, G# and B are highlighted.