Guitar Theory Studio
CAGED system

The CAGED A Shape

The A shape of the CAGED system: the open A chord as a barre chord, where it sits for all 12 major chords, and the scale and pentatonic box around it.

The CAGED A shape: the A major scale on the guitar fretboard with the A-shape chord's root, 3rd and 5th marked13578910121415AAeBGDAEEF#G#ABC#DEF#BC#DEF#G#ABC#DG#ABC#DEF#G#ADEF#G#ABC#DEABC#DEF#G#ABEF#G#ABC#DEF#

Tap any note on the neck.

Swipe the neck sideways to see the higher frets.

Open chord
A   x02220
Roots on
the 5th and 3rd strings
Chord tones, low to high
root, 5th, root, 3rd, 5th
Shown in
A Major
All five shapes
C   A   G   E   D
Open this in the fretboard tool →

The A shape as a chord

Open, it is the A chord every beginner learns (x02220). From the 5th string up it plays root, 5th, root, 3rd, 5th. Put a barre where the nut was and the same fingering plays any major chord — here, G major at frets 10–12. The root notes are the dark dots.

A (open)
A (open) chord shape×AEEAC#
A shape
G (barre)
G (barre) chord shape10fr×GDGBD
A shape at frets 10–12

How to find the A shape for any major chord

Find the root you want on the 5th string and bar your first finger across that fret; the rest of the A shape sits above the barre. Here it is for all twelve major chords, from the open A up the neck; tap one to see it on the fretboard.

The scale around the A shape

Hold G in the A shape at frets 10–12 and the notes around your fingers are the G major scale in this position, with the chord’s root, 3rd and 5th marked. That is the A-shape scale pattern, and it moves with the chord.

G major scale around the A-shape barre chord, frets 10–121357891012AeBGDAEEF#GABCDEBCDEF#GABGABCDEF#GDEF#GABCDABCDEF#GAEF#GABCDE

The pentatonic box inside it — frets 9–12

G major pentatonic, position 4, frets 9–128910111213DEGABDEGABDE

The A shape and its neighbours

In A major the five shapes climb the neck in CAGED order, and the A shape comes round again twelve frets up. Where two shapes share frets is where you change shape without moving your hand.

  1. A shape at frets 0–2 (shares fret 2 with the G shape)
  2. G shape at frets 2–5 (shares fret 5 with the E shape)
  3. E shape at frets 5–7 (shares fret 7 with the D shape)
  4. D shape at frets 7–10 (shares frets 9–10 with the C shape)
  5. C shape at frets 9–12 (shares fret 12 with the A shape)
  6. A shape at frets 12–14

In every key the A shape takes over from the C shape below it and hands on to the G shape above it; only the starting fret changes with the root. All five shapes, connected →

How to practice the A shape

  1. Play the open A chord, then the same shape as G at frets 10–12, until the barre version rings as cleanly as the open one.
  2. Move it one fret at a time and say each chord’s name as you land on it; the list above has every fret.
  3. Hold the barre chord, play the pentatonic box around it, and finish each run on a chord tone. That is the step from chords to lead lines.

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