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 equaltempered) 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 equaltempered scale by x cents.