A Major Scale

Open A string is your root

The open A string (5th string) is the tonic of A major — an instantly accessible root note. Build your scale runs and phrases around that open string to get the ringing, natural sound of A major at its best.

Three sharps: F#, C#, G#

A major sharpens three notes. Memorise the fret positions of F#, C#, and G# across all six strings and you'll navigate A major without counting intervals each time.

Use the open-position A major box

The most natural open-position A major scale runs from the open A string through frets 2–4 on the remaining strings. This position sits perfectly under the hand and is the starting point for most A major lead work.

A major and E major are first cousins

A major and E major share five of their seven notes. If you know E major well, A major requires only two adjustments — G# instead of G, and D# instead of D. The fingerboard shapes are closely related.

Second most popular rock key after E

Countless blues and rock solos are in A or the parallel A minor / A blues scale. Knowing A major fluently means you can switch between A major, A Dorian, A minor pentatonic, and A blues within a single song effortlessly.

The B string shifts the pattern

On guitar, the B string is tuned a half step lower than the others relative to the fretboard geometry. In A major, watch the B-string — the pattern shifts slightly, which trips up players who have only learned straight-across shapes.