C major scale
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
E
B
G
D
A
E
Diatonic Chords
- I C major
- ii D minor
- iii E minor
- IV F major
- V G major
- vi A minor
- vii° B diminished
Common Chord Progressions
- C IF IVG V
- D iiG VC I
- C IF IVA viG V
- C IE iiiF IVG V
- C IE iiiA viG V