Major Scale Pattern

Whole Steps and Half Steps

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A major scale is one of the most important patterns in music because it forms the basis of melodies, chords, and key signatures used in many songs. Instead of being defined by specific note names, a major scale is defined by the spacing between notes. That spacing follows a fixed pattern of whole steps and half steps. Once you know the pattern, you can build a major scale starting on any note.

The major scale pattern is Whole, Whole, Half, Whole, Whole, Whole, Half, often written as W - W - H - W - W - W - H. A whole step moves two piano keys or two semitones, while a half step moves one key or one semitone. For example, starting on C and following the pattern gives C, D, E, F, G, A, B, C. This same interval formula works for every major scale, even when sharps or flats are needed to keep the pattern correct.

Key Facts

Major scale pattern: W - W - H - W - W - W - H
1 whole step = 2 half steps
1 half step = 1 semitone
C major scale: C D E F G A B C
Scale degrees in a major scale: 1 2 3 4 5 6 7 8
Semitone positions in a major scale occur between degrees 3-4 and 7-8

Vocabulary

Major scale: A seven-note scale built from the interval pattern whole, whole, half, whole, whole, whole, half.
Whole step: An interval equal to two half steps or two semitones.
Half step: The smallest standard interval in Western music, equal to one semitone.
Interval: The distance in pitch between two notes.
Scale degree: The numbered position of a note within a scale, such as 1 for the tonic and 5 for the dominant.

Common Mistakes to Avoid

Treating the major scale as a list of note names instead of an interval pattern, which is wrong because the same note names only work for C major and not for every key.
Counting a whole step as one key on a piano, which is wrong because a whole step spans two half steps and includes the next note after the adjacent key.
Forgetting that half steps in the major scale occur between degrees 3 and 4 and between 7 and 8, which is wrong because changing those positions breaks the major scale pattern.
Using the right letter names but the wrong accidentals, which is wrong because every major scale must preserve both the W - W - H - W - W - W - H pattern and the correct sequence of letter names.

Practice Questions

1 Starting on G, build the major scale by applying the pattern W - W - H - W - W - W - H. Write all eight notes.
2 How many total half steps are in one octave major scale from the first note to the eighth note? Use the pattern W - W - H - W - W - W - H to calculate the total.
3 Explain why F to G is a whole step but E to F is a half step on a piano, and describe how that affects the structure of a major scale.