Music Theory Cheat Sheet
Everything you need to know about a key, all in one place. Select a root note to update the entire page.
📝 Scale Notes
C
I
D
II
E
III
F
IV
G
V
A
VI
B
VII
Formula: W – W – H – W – W – W
🔑 Key Info
KeyC major
Relative MinorA minor
Key SignatureNo sharps or flats
🎵 Diatonic Triads
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°
B°
B D F
🎼 Seventh Chords
Imaj7
Cmaj7
C E G B
ii7
Dm7
D F A C
iii7
Em7
E G B D
IVmaj7
Fmaj7
F A C E
V7
G7
G B D F
vi7
Am7
A C E G
viiø7
Bm7♭5
B D F A
⚡ Chord Functions
tonic
Iiiivi
subdominant
iiIV
dominant
Vvii°
📐 Scale Degrees
🎶 Modes
Ionian (I)
C
C D E F G A B
Dorian (ii)
D
D E F G A B C
Phrygian (iii)
E
E F G A B C D
Lydian (IV)
F
F G A B C D E
Mixolydian (V)
G
G A B C D E F
Aeolian (vi)
A
A B C D E F G
Locrian (vii°)
B
B C D E F G A