Photon Flux Calculator

Calculate photon energy, flux, and irradiance from wavelength and power or pulse energy.

Source

Wavelength (λ)

Optical Power

Beam Geometry (optional)

Beam Diameter (1/e²)?

Photon Energy

Energy per photon

1.9593eV

Energy per photon

3.1391e-19J

Photon Flux

Photon flux

Φ = P / E_photon

6.3712e+15photons/s

Abridged Optics — Photon Flux Calculator v1.0Beam area assumes circular 1/e² Gaussian profile

All information, equations, and calculations have been compiled and verified to the best of our ability. For mission-critical applications, we recommend independent verification of all values. If you find an error, please let us know.