Cycle of 5ths

The cycle of fifths (or circle of fifths) is a visual map that organizes the 12 pitches of the chromatic scale. Arranged like a clock face, it illustrates the structural relationships between keys, showing how they connect through the interval of a perfect fifth. This framework reveals how each key transitions into the next while mapping out corresponding scales and chords.

Starting with C major (zero sharps or flats) at the 12 o'clock position, moving clockwise ascends by fifths, systematically adding one sharp per step. Conversely, moving counterclockwise descends by fifths (or ascends by fourths), adding one flat per step. This elegant pattern helps musicians easily calculate key signatures and identify relative minor keys, which sit on an inner concentric ring and share the exact same accidentals.