Angular Unit Converter
Convert between degrees, radians, milliradians, microradians, arc-minutes, and arc-seconds. Calculate beam spread at a distance.
Angular quantities in photonics and beam characterization appear in six common units depending on context: degrees for large rotation angles and goniometer settings, radians for analytical computation, milliradians (mrad) for beam divergence and pointing stability, microradians (µrad) for fine alignment tolerances, arc-minutes for angular apertures, and arc-seconds for astronomical and autocollimator specifications. This converter accepts any angle in any of these units and returns all six equivalents simultaneously. A secondary beam-spread panel computes lateral growth — radius and diameter — at a user-specified propagation distance for either the full divergence angle or the half-angle, useful for estimating spot size at a target or detector at distance.