Photon Flux Calculator
Enter laser power and wavelength OR irradiance. The Photon Flux Calculator instantly computes photon flux in photons/s or photons/s/m².
About the Photon Flux Calculator
The Photon Flux Calculator is a precise, scientifically accurate tool that computes photon flux — the number of photons per second (or per second per m²) — from optical power or irradiance using the fundamental Planck-Einstein relation. This Photon Flux Calculator implements the exact formula Φ = P / (h c / λ), essential in quantum optics, photochemistry, and laser physics. Proudly supported by Agri Care Hub.
Scientific Formulas
Flux from power: Φ = P / E = P λ / (h c)
Flux from irradiance: Φ_area = I / E = I λ / (h c)
h = 6.62607015 × 10⁻³⁴ J s
c = 299792458 m/s
Why This Calculator Is Essential
Photon flux is crucial in: • Quantum optics and single-photon sources • Photochemistry and reaction rates • Photosynthesis and solar energy • Laser cooling and trapping • Fluorescence microscopy • Semiconductor and detector characterization Knowing exact photon numbers (not just power) is required for quantum experiments and rate calculations.
How to Use
- Choose mode: Power → photons/s or Irradiance → photons/s/m².
- Enter power (W) or irradiance (W/m²).
- Enter wavelength λ in nm.
- For irradiance mode, enter beam area.
- Click “Calculate Photon Flux”.
When Should You Use This Tool?
- Quantum optics experiments
- Photochemical reaction rate calculation
- Laser spectroscopy
- Photosynthesis and plant growth studies
- Detector quantum efficiency testing
- Teaching quantum light-matter interaction
Scientific Foundation
Photon flux is derived from the Planck-Einstein relation E = hν = h c / λ. The number of photons per second is power divided by photon energy. This is exact in the photon picture of light and used universally in quantum optics. Full theory at Photon Flux on Wikipedia and all quantum optics textbooks.
Conclusion
The Photon Flux Calculator brings the quantum nature of light — counting individual photons — to your browser with perfect accuracy and beautiful design. Whether you’re a student learning quantum optics, a researcher studying photochemical rates, or an engineer designing laser systems, this tool delivers precise results every time. For more quantum tools, visit Agri Care Hub.