GuitarTheory
Built for guitarists who want to understand music theory, not just memorize it.
Circle of Fifths
A visual map of all 12 keys and how they relate — tap any key to explore its scale, chords, and modes.
Key of C
Related Keys
Dominant: G
Subdominant: F
Relative Minor: Am
Ionian (Major) Scale
CDEFGAB
Bright, happy, stable - the standard major scale
Major Chord
CEG
Diatonic Chords in C
Major
Minor
Dim
C - Fretboard View
Display:
Root Note
Scale Tone
Open String