Note Approximate Frequency (Hz)

C5

523
C# 554
D5 587
D# 622
E5 659
F5 698
F# 739
G5 783
G# 830
A5 880
A# 932
B5 987

C6

1046
C# 1108
D6 1174
D# 1244
E6 1318
F6 1396
F# 1479
G6 1567
G# 1661
A6 1760
A# 1864
B6 1975

C7

2093
C# 2217
D7 2349
D# 2489
E7 2637
F7 2793
F# 2959
G7 3135
G# 3322
A7 3520
A# 3729
B7 3951

For more information about notes, frequencies, and wavelengths, see: http://www.phy.mtu.edu/~suits/notefreqs.html