Chords in the Key of C Major

The key of C major has no sharps or flats. Its scale is C – D – E – F – G – A – B, and its chords are C, Dm, Em, F, G, Am, Bdim.

The C major scale.

Chords in C major

Degree	Chord	Seventh chord	Notes
I	C	Cmaj7 Imaj7	C – E – G
ii	Dm	Dm7 ii7	D – F – A
iii	Em	Em7 iii7	E – G – B
IV	F	Fmaj7 IVmaj7	F – A – C
V	G	G7 V7	G – B – D
vi	Am	Am7 vi7	A – C – E
vii°	Bdim	Bm7♭5 viiø7	B – D – F

Common chord progressions in C major

I – IV – V – I: C – F – G – C
I – V – vi – IV: C – G – Am – F
ii – V – I: Dm – G – C
I – vi – IV – V: C – Am – F – G

Related keys

A minor (relative minor, same notes)
C minor (parallel minor, same starting note)
G major (dominant key, a fifth up)
F major (subdominant key, a fifth down)