Gaussian Beam Calculator

Calculate Gaussian beam propagation parameters \u2014 Rayleigh range, divergence, beam radius, and beam quality.

Beam Parameters
Enter beam waist radius and wavelength to see results.
Abridged Optics — Gaussian Beam Calculator v1.0z_R = \u03C0w\u2080\u00B2/(M\u00B2\u03BB) \u00B7 \u03B8 = M\u00B2\u03BB/(\u03C0w\u2080) \u00B7 w(z) = w\u2080\u221A(1+(z/z_R)\u00B2)

All information, equations, and calculations have been compiled and verified to the best of our ability. For mission-critical applications, we recommend independent verification of all values. If you find an error, please let us know.