Harmonic Map
Circle of Fifths
Explore how keys relate. Click any segment to retune the whole page — the chord map, relationships, key signature and fretboard all follow.
Grel. Em1 sharp
Circle of Fifths — ascending by perfect fifths (C → G → D → A…)
Selected key G major
Key Relationships — G Major
Relative Minor
Em
Parallel Minor
Gm
Dominant (V)
Subdominant (IV)
Common Modulation Targets
Key Signature
G major·1 sharp · F♯
Chord Progression Builder
Presets
Diatonic chords — tap to add
Progression (0/8)
Add chords from above or pick a preset to build a progression.
Scale on the Fretboard — G Major
Root Scale note Standard tuning · tap a note to hear it