Wavenumber to Wavelength Conversion Calculator

This is an online calculator that calculates Wavelength in Nanometers. Just enter the Wavenumber value to get the corresponding Wavelength value.
Enter the Wavenumber to Calculate the Wavelength Value
  • cm-1

Result

  • Wavelength in Nanometers
    nm

Wavenumber is defined as the number of waves per unit distance. It is the inverse of the wavelength. Wavelength is the distance between two consecutive points in a wave which are in same phase.

Consider wavelength in nm,


Now to convert m-1 to cm-1, 

We’ve,


So (1) can be written as,