The key of C Major mostly uses the notes of the C major scale, which are C, D, E, F, G, A, and B. The key signature has no sharps or flats, and its relative minor key is A minor.
It’s the easiest key for musicians to think in and is a good doorway into the world of music theory.
C Major Diatonic Chords
The C Major key uses the scale degree chords of the G major scale, which are C, Dm, Em, F, G, Am and Bmb5.
I ii iii IV V vi vii°
C Dm Em FG Am Bmb5
C Major Cadences
An easy way to find out if a song is in the C Major key is to look for cadences. A cadence is a melodic or chord progression that moves towards a point of rest or resolution and is the most common way to define a key.
- Intervals: IV – V – I
- Chords: F – G – C
- Intervals: ii – V – I
- Chords: Dm – G – C