I-Da Chiang

Wavelength unit conversion webtool

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To use, simply input the known value to the corresponding cell. The calculated value for all the others will be rounded to the fourth decimal. This webtool is based on the one developed by Halas Nanophotonics Group.

Wavelength	λ
Å	nm	µm	cm
Frequency	ν=c/λ
THz	GHz
Energy	E=hc/λ
keV	eV	meV
Wave number	k=2π/λ
cm-1 (Physics)
Linear wave number	ν=1/λ
cm-1 (Chemistry)

Useful lines

HI 21 cm line: 1.420405752 GHz

Ly α: 121.567 nm

CO J:1 →0: 115 GHz

Reference

Halas Nanophotonics Group

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