I-IV-V foundation
This is the core major-key movement behind blues, rock, country, and pop progressions.
Guitar chord companion
A Major 13 Chord
Learn the A Major 13 chord on guitar with chord tones, intervals, and interactive fretboard shapes.
1A3C#7G#9B13F#
Playable A Major 13 Chord voicings
Start with these chord-box shapes, then use the full fretboard below to see every chord tone.
A shape, open position
Low to high strings: x 0 4 4 2 4
G shape, fret 4
Low to high strings: 5 4 4 4 x 4
E shape, fret 5
Low to high strings: 5 x 6 6 7 x
D shape, fret 7
Low to high strings: x x 7 11 9 9
C shape, fret 9
Low to high strings: x 12 9 11 9 9
Full fretboard map
Every A Major 13 Chord chord tone across the neck, with roots highlighted for quick orientation.
Frets 0–24. Select a position or tap a note to hear it.
CAGED
Progression examples using A Major 13
Try these progressions to hear the harmony in context. On bass, outline each chord with individual target tones.
I-vi-IV-V loop
A familiar pop progression that balances a stable tonic with relative minor color.
Chord Tones
| Degree | Interval | Note | Default guitar voicing |
|---|---|---|---|
| 1 | Root | A | Included |
| 3 | M3 | C# | Included |
| 5 | P5 | E | Usually omitted |
| 7 | M7 | G# | Included |
| 9 | M9 | B | Included |
| 11 | P11 | D | Usually omitted |
| 13 | M13 | F# | Included |
The table shows the complete theoretical chord. The default guitar voicing uses A, C#, G#, B, F#; degrees 5, 11 are usually omitted. Chord-tone maps include every formula tone.
Scales Containing the Complete Formula
Complete Formula
1 – 3 – 5 – 7 – 9 – 11 – 13
Compound degrees retain their names: 9, 11, and 13 are extensions. A voicing may place their pitches in a closer register.