Ok if C4 had a pitch of 440Hz, which makes no sense, the approximate frequencies would be the following:

C4 - 440 Hz
C# - 466.16 Hz
D - 493.88 Hz
D# - 523.25 Hz
E - 554.37 Hz
F - 587.33 Hz
F# - 622.25 Hz
G - 659.26 Hz
G# - 698.46 Hz
A - 739.99 Hz
A# - 783.99 Hz
B - 830.61 Hz
C5 - 880 Hz

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