Circle of Fifths
Click any key to explore its scales, chords, and relationships
C Major / A Minor
Chords in This Key
How the Circle of Fifths Works
The circle of fifths arranges all 12 musical keys by the number of sharps or flats in their key signature. Moving clockwise, each key is a perfect fifth higher than the last, and adds one sharp. Moving counter-clockwise, each key is a perfect fourth higher (or fifth lower), adding one flat.
Why It Matters for Guitar
The circle of fifths tells you which chords naturally belong together. Keys that are next to each other on the circle share most of their notes, which means their chords blend well. This is why a song in G major often uses C and D chords — they're neighbors on the circle.
Relative Major and Minor
Every major key has a relative minor that shares exactly the same notes. The relative minor is always 3 half steps below the major key. A minor is the relative minor of C major — same notes, different starting point, completely different feel.
Key Signatures
Starting from C (no sharps or flats), each step clockwise adds one sharp: G has 1♯, D has 2♯, A has 3♯, and so on. Going counter-clockwise adds flats: F has 1♭, B♭ has 2♭, E♭ has 3♭. The circle gives you a visual way to remember all of this.
Using It for Songwriting
When writing or analyzing songs, the circle shows you which key changes will sound smooth (neighboring keys) versus dramatic (distant keys). It also helps you understand chord substitutions — chords from nearby keys often work as interesting alternatives in a progression.
🎸 Related Tools
- Chord Construction — How each chord type is built
- Pentatonic Scales — The most essential guitar scales
- Chord Library — Visual chord diagrams for every key
- Metronome — Practice in time