What is the circle of fifths and why is it important?
The circle of fifths is a diagram arranging all 12 pitches in a circle where each adjacent pitch is a perfect fifth apart. It shows key relationships, the number of sharps or flats in each key, and is essential for understanding modulation and harmony.
How do I use the circle of fifths for key changes?
Adjacent keys on the circle share six of seven notes, making transitions between them smooth. The Circle of Fifths tool shows modulation routes, pivot chords (shared between two keys), and cadence points for planning key changes.
What are pivot chords in modulation?
Pivot chords are chords that exist naturally in both your current key and your target key. They provide a smooth transition point for modulating between keys. The tool highlights these shared chords for any pair of keys.
How does the circle of fifths relate to chord progressions?
Moving clockwise around the circle gives you the V-I resolution pattern that underpins most Western harmony. Counterclockwise movement creates IV-I plagal cadences. Understanding the circle helps you create stronger, more intentional progressions.
What are relative keys on the circle of fifths?
Relative keys share the same key signature. C major and A minor are relatives. On the circle, they sit at the same position. Understanding relative keys helps you borrow chords and create smoother progressions.
Keys that sit next to each other on the wheel share almost all their notes, so moving between them sounds smooth. Pick a key to see its chords, its cadences, and the shortest route to any other key.
The wheel
Outer ring: major keys, with how many sharps or flats each one carries. Inner ring: the minor key built from the same notes.
AmEmBmF♯mC♯mG♯mD♯mA♯mFmCmGmDm
Selected
C
major
or Am
Selected key
Its closest neighbours (IV and V)
Key you are moving to
Step clockwise for brighter, more driving key changes; step counterclockwise for softer ones. Each step adds or removes one sharp or flat.