Photon rate calculator

Calculate the photon rate from wavelength and optical power, or solve for any unknown given the other two values.

The relationship between optical power PP, photon rate RR, and wavelength λ\lambda is:

R=P⋅λh⋅cR = \frac{P \cdot \lambda}{h \cdot c}
Parameters
nm
dBm
Hz

Changelog

v1.0.0 2026-01-09
  • Initial release.

License

This tool is licensed under CC BY-NC-SA 4.0.

"Commercial use" includes, but is not limited to, use by or on behalf of any for-profit entity, use in connection with any revenue-generating activity, and internal business use within any commercial organization. For commercial licensing, please write to contact@jankrause.org.