Wavelength Frequency Calculator

Convert between wavelength, frequency, and period for electromagnetic waves. Enter any value and the others update automatically.

Frequency

Wavelength

Period

EM Band

Frequency (Hz)

Wavelength (m)

Photon Energy

Angular Frequency

rad/s

Wavelength, Frequency, and Period

Electromagnetic waves travel at the speed of light (c = 299,792,458 m/s in vacuum). Wavelength, frequency, and period are related by simple formulas.

c = f x lambda
lambda = c / f
T = 1 / f
E = h x f (photon energy, h = 6.626e-34 J*s)