The 12-Interval Chromatic Scale

Symbol for Note

Ratio of Frequency, as Power of 2^(1/12)

Ratio of Frequency

C

0

1.00

C sharp, D flat

1

1.05946

D

2

1.12246

D sharp, E flat

3

1.18921

E, F flat

4

1.25992

F, E sharp

5

1.33484

F sharp, G flat

6

1.41421

G

7

1.49831

A flat, G sharp

8

1.58740

A

9

1.68179

B flat, A sharp

10

1.78180

B, C' flat

11

1.88775

C', B sharp

12

2.00

Octave

Power of 2

Value for C in cps

subcontra

0

16.35

contra

1 (2)

32.70

great

2 (4)

65.41

small

3 (8)

130.81

1 line

4 (16)

261.83

2 line

5 (32)

523.25

3 line

6 (64)

1046.50

4 line

7 (128)

2093.00