Wavelength to Frequency Calculator

This calculator allows you to quickly calculate light’s frequency and wavelength, represented as either Hertz (Hz), Terahertz (Thz), or Nanometers (nm). Enter a value into any field to convert to each of the other units.

Wavelength in Nanometers (nm):

Frequency in Hertz (Hz):

Frequency in Terahertz (THz):

Note: This calculation assumes light is traveling in a vacuum at 299792458m/s

Want to convert a wavelength or frequency to a color?
Enter the wavelength into the Wavelength to Color Convert.