The A Major scale is a major scale which means it has the following definition:
R 2 3 4 5 6 7
The notes in the A Major scale are:
A B C# D E F# G# A
There are 7 notes in the scale with no flats and 3 sharps.
The scale definition for the A Major guitar scale is R 2 3 4 5 6 7 which means that the interval formula for the scale in semitones is:
2 2 1 2 2 2 1
You can also write this as note intervals:
Tone Tone Semitone Tone Tone Tone Semitone
Let's take a look at A Major on the guitar fretboard. Here is the scale across the entire fretboard:
Here is a quick recap of all the information about the A Major covered in this page:
The A Major Scale is a major scale.
The definition of the A Major scale is: R 2 3 4 5 6 7
The notes in the A Major guitar scale are: A B C# D E F# G# A
The interval formula for the A Major scale is: 2 2 1 2 2 2 1
The note intervals in the A Major scale are: Tone Tone Semitone Tone Tone Tone Semitone