Frequencies of Musical Notes
C4261.63C♯4/D♭4277.18D4293.66D♯4/E♭4311.13E4329.63F4349.23F♯4/G♭4369.99G4392.00G♯4/A♭4415.30A4440.00A♯4/B♭4466.16B4493.88C5523.25C♯5/D♭5554.37D5587.33D♯5/E♭5622.25E5659.25F5698.46F♯5/G♭5739.99G5783.99G♯5/A♭5830.61A5880.00B5987.77A♯5/B♭5932.33C61046.50C♯6/D♭61108.73D61174.66D♯6/E♭61244.51E61318.51F61396.91F♯6/G♭61479.98G61567.98G♯6/A♭61661.22A61760.00A♯6/B♭61864.66B61975.53C72093.00C♯7/D♭72217.46D72349.32D♯7/E♭72489.02E72637.02F72793.83F♯7/G♭72959.96G73135.96G♯7/A♭73322.44A73520.00A♯7/B♭73729.31B73951.07C84186.01
Source: https://pages.mtu.edu/~suits/notefreqs.htmlSee the source for more notes, wavelengths, etc.