The formula to convert wavenumber to wavelength is:

Below is a calculator to calculate wave number from wavelength. Insert wavelength and your units and press calculate wavenumber:

Insert wavelength: | |

Insert units (optional): |

The units will be the inverse of wavelength, for example, if your units for wavelength is nm, the units for wavenumber is nm^{-1}.

The formula to convert wavelength to wavenumber is:

Below is a calculator to calculate wavelength from wave number. Insert wavenumber and your units and press calculate wavelength:

Insert wavenumber: |

The units will be the inverse of wavenumber, for example, if your units for wavenumber is nm^{-1}, the units for wavelength is nm.

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