Spectral Unit Converter
Enter wavelength, frequency, wavenumber, or photon energy — get all equivalent values instantly.
Input
Visible (Red)
632.8 nm
Wavelength
Nanometres
632.8nmMicrometres
0.63280µmÅngströms
6328.0ÅFrequency
Terahertz
473.8THzGigahertz
473755.5GHzHertz
4.7376e+14HzWavenumber
Spectroscopic
15802.8cm⁻¹ν̃ = 1/λ — proportional to energy
Angular
9.9292e+6rad/mk = 2π/λ — used in wave equations
Photon Energy
Electron volts
1.9593eVJoules
3.1391e-19JAbridged Optics — Spectral Unit Converter v1.0Constants: 2019 SI redefinition (c, h, e exact)