Tools
Circle of fifths
All 12 keys arranged by perfect fifths. Each major key shows its relative minor on the inside ring.
Circle of fifths
How to read it
Clockwise adds a sharp. Counterclockwise adds a flat. Adjacent keys share six of their seven notes, which makes modulation between them sound smooth.
Relatives
Each major key shares all its notes with the minor key on its inner ring. C major and A minor use the same seven natural notes.