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Music Theory
The Basics
The Staff & Clefs
Note & Rest Symbols
Note Frequencies
Vocal Ranges
Time Signatures
Sharps & Flats
Scales & Keys
Major & Minor Scales
The Diatonic Scale
Scale Degrees
Key Signatures
Circle of Fifths
Scale Formulas
All Scales & Modes
Intervals
Intervals Chart
Chords & Harmony
Chord Formulas
Chords in Keys
Chord Functions
Chord Progressions
Reference
Cheat Sheet
Circle of Fifths
Explore key relationships. Click any segment to select a key, then see its diatonic chords.
Major
Minor
C
G
D
A
E
B
F#/Gb
Db
Ab
Eb
Bb
F
Am
Em
Bm
F#m
C#m
G#m
D#m/Ebm
Bbm
Fm
Cm
Gm
Dm
C
major
Chords in
C major
I
C
C · E · G
ii
Dm
D · F · A
iii
Em
E · G · B
IV
F
F · A · C
V
G
G · B · D
vi
Am
A · C · E
vii°
Bdim
B · D · F
Tonic
Subdominant
Dominant
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