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Table 2. Frequency Chart

No.   Helmholtz
Pitch
Notation
International
Pitch
Notation
Standard
Harp Octave
Designation
Frequency
Hz
1 C C2 C6 65.4
2 D 73.4
3 E 82.4
4 F 5th Octave 87.3
5 G 98
6 A 110
7 B 123
8 c C3 C5 130.8
9 d 146.8
10 e 164.8
11 f 4th Octave 174.6
12 g 196
13 a 220
14 b 246
15 Middle c' C4 C4 261.6
16 d' 293.6
17 e' 329.6
18 f' 3rd Octave 349.2
19 g' 392
20 a' A4 440
21 b' 492
22 c'' C5 C3 523.2
23 d'' 587.2
24 e'' 659.2
25 f'' 2nd Octave 698.4
26 g'' 784
27 a'' 880
28 b'' 984
29 c''' C6 C2 1046.4
30 d''' 1174.4
31 e''' 1318.4
32 f''' 1st Octave 1396.8
33 g''' 1568
34 a''' 1760
35 b''' 1968
36 c'''' C7 C1 2092.8

The right hand column shows frequencies of the C major scale (in concert pitch A440Hz equal-tempered) within the range most commonly found on celtic harps.

Use the calculator below to find the frequency of chromatic notes (sharps or flats) or notes deviating from the equal-tempered scale by x cents.

Frequency
Hz
+ 1 semitone =
Hz
 
Frequency
Hz
+ deviation
cents
=
Hz