Piano Note Frequencies
(in Hertz)
(or... Play It Again, Sam)
Notes
Octaves 
O1
O2
O3
O4
O5
O6
O7
O8
A
27.500
55.000
110.000  220.000 440.000 880.000 1760.000
3520.000
Bb
29.135
58.270
116.541 233.082 466.164 932.328 1864.655
3729.310
B
30.868
61.735
123.471 246.942 493.883 987.767 1975.533
3951.066
C
32.703
65.406
130.813 261.626 523.251 1046.502 2093.004
4186.009
C#
34.648
69.296
138.591 277.183 554.365 1108.731 2217.461  
D
36.708
73.416
146.832 293.665 587.330 1174.659 2349.318  
Eb
38.891
77.782
155.563 311.127 622.254 1244.598 2489.016  
E
41.203
82.407
164.814 329.629 659.255 1318.520 2637.020  
F
43.654
87.307
174.614 349.228 698.456 1396.913 2793.826  
F#
46.249
92.499
184.997 369.994 739.989 1479.978 2959.955  
G
48.999
97.999
195.998 391.995 783.991 1567.982 3135.437  
G#
51.913
103.826
207.652 415.305 830.609 1661.219 3322.437  
 
O1
O2
O3
O4
O5
O6
O7
O8

The numbers in GREEN are the twelve pitches of the temperament octave. This table was calculated by multiplying each successive half step by 1.0593631 (the twelfth root of two).
The standard reference frequency (A-440) for tuning is in PURPLE.
The lowest frequency is in RED and highest frequency is in BLUE.
 

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