Mastering the Major Scale With 5th Intervals – Guitar Lesson

The major scale is one of the most fundamental building blocks in music, it’s the “home base” for most Western melodies and harmonies.

Here’s what it is, step by step:

The major scale is a sequence of seven notes arranged in a specific pattern of whole steps (W) and half steps (H):

W – W – H – W – W – W – H

This pattern stays the same no matter what note you start on, that’s what defines the major sound and it works for any major scale.

Example With C major scale

If we start on C, and follow the pattern:

C → D → E → F → G → A → B → C
(W) (W) (H) (W) (W) (W) (H)

So the notes are:
C, D, E, F, G, A, B

Here the G major scale which will serve as a basis for the exercise :

If we start on G, and follow the pattern:

G → A → B → C →D → E → F♯ → G
(W) (W) (H) (W) (W) (W) (H)

So the notes are:
G, A, B, C, D, E, F♯

Notice that there’s an F♯.

If we used F natural, the distance from E → F would be a half step,
but the formula says we need a whole step there.

So, to keep the spacing correct (a full two frets between E and F♯), we raise F by one semitone — making it F♯.

That’s why G major must have one sharp: F♯