Photon Energy Calculator

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Pick whichever quantity you have. The calculator solves for all the others.
Visible light spans roughly 380-750 nm.
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Photon energy
2.4797eV
Energy in joules3.9729e-19J
Energy per mole of photons239.25kJ/mol
Frequency599.585THz
Wavelength500nm
Wavenumber20,000cm⁻¹
2.4797 eV
Infrared / lower<1.65Visible1.65-3.26Ultraviolet3.26+

Each photon carries 3.973e-19 J, 2.48 eV, in the visible band.

  • Photon energy is fixed by frequency: E = h·f = 599.585 THz × h, giving 3.973e-19 J.
  • That is 2.48 eV, or 239.3 kJ for a whole mole of these photons (an einstein).
  • At 2.48 eV this photon sits in the visible part of the spectrum.

Next stepToggle on the beam option to turn a radiant power into a photon flux (photons per second).

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