The Twelve-Spoked Wheel
A way of visualizing and calculating intervals
C (0)
Yes
No
C#/Db (1)
Yes
No
D (2)
Yes
No
D#/Eb (3)
Yes
No
E (4)
Yes
No
F (5)
Yes
No
F#/Gb (6)
Yes
No
G (7)
Yes
No
G#/Ab (8)
Yes
No
A (9)
Yes
No
A#/Bb (10)
Yes
No
B (11)
Yes
No
Tritone
b2/M7
P4/P5
M2/b7
M3/b6
b3/M6
0
1
2
3
4
5
6
7
8
9
10
11