C major

C major
${ \magnifyStaff #3/2 \omit Score.TimeSignature \key c \major s2 \clef F \key c \major s }$
Relative key	A minor
Parallel key	C minor
Dominant key	G major
Subdominant key	F major
Component pitches
	C, D, E, F, G, A, B

C major is a major scale based on C, consisting of the pitches C, D, E, F, G, A, and B. C major is one of the most common keys used in music. Its key signature has no flats or sharps. Its relative minor is A minor and its parallel minor is C minor.

The C major scale is:

$\header { tagline = ##f } scale = \relative b { \key c \major \omit Score.TimeSignature c^"C natural major scale" d e f g a b c b a g f e d c2 \clef F \key c \major } \score { { << \cadenzaOn \scale \context NoteNames \scale >> } \layout { } \midi { } }$

Changes needed for the melodic and harmonic versions of the scale are written in with accidentals as necessary. The C harmonic major and melodic major scales are:

$\header { tagline = ##f } scale = \relative b { \key c \major \omit Score.TimeSignature c^"C harmonic major scale" d e f g as b c b as! g f e d c2 \clef F \key c \major } \score { { << \cadenzaOn \scale \context NoteNames \scale >> } \layout { } \midi { } }$

$\header { tagline = ##f } scale = \relative b { \key c \major \omit Score.TimeSignature c^"C melodic major scale" d e f g a b c bes as g f e d c2 \clef F \key c \major } \score { { << \cadenzaOn \scale \context NoteNames \scale >> } \layout { } \midi { } }$

On the piano, the C major scale can be played by playing only the white keys starting on C.