Photon Energy Calculator

Calculate photon energy from frequency or wavelength

Frequency (Hz):

Wavelength (m):

h = 6.626e-34 J·s (Planck's constant)

c = 2.998e8 m/s (speed of light)

E = hf (energy from frequency)

E = hc/λ (energy from wavelength)

c = fλ (wave equation)