Photon Energy Calculator
Energy, frequency and momentum of a photon from its wavelength (Planck–Einstein relation), in joules and electronvolts.
How to use the Photon Energy Calculator
- Enter or select: Wavelength λ.
- The results (Frequency, Energy, Momentum, Energy per mole, Spectrum region) are calculated instantly as you type.
- Use “Copy link” to share the calculation with the same input values.
Formula
- E = hf = hc/λ
- p = h/λ