Photon Energy Calculator
Convert wavelength to energy (J, eV) and frequency.
How to Use This Calculator
1
Enter λ
Provide the light wavelength in nanometers (nm).
2
Calculate
We compute energy in joules and eV, and the frequency.
Formula
E = h f, f = c / λ → E = h c / λ
About Photon Energy Calculator
Quickly convert wavelengths to photon energy, used across spectroscopy and optics.
Frequently Asked Questions
What units are used?
Input λ in nm; outputs include eV, J, and THz.
Does medium matter?
Assumes vacuum; in media use c/n for frequency (energy unchanged).