Calculate the energy of a photon given its frequency or wavelength. Photon energy is directly proportional to frequency and inversely proportional to wavelength, as described by Planck's relation.
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Frequency of the photon
Wavelength of the photon
How this calculator works
Photon energy equals Planck's constant times frequency, or equivalently Planck's constant times speed of light divided by wavelength.
Common questions about this calculator
These calculators are for educational and informational purposes only. While we strive for accuracy, results should be verified for critical applications. Always consult authoritative sources for engineering or scientific work.
