Unit mrad
Name milliradian
Category Angle
Details A milliradian (mrad) is a unit of angle measurement used in various fields, including optics, engineering, and ballistics. It is derived from the base unit, radian (rad), which is defined as the angle created when the radius of the circle is laid out along the circle's circumference. A radian is equal to approximately 57.3 degrees.

A milliradian is one thousandth (1/1000th) of a radian, making it useful for measuring smaller angles. It is a common unit used in applications like adjusting the angular position of a rifle scope or determining the angle and range of elevation in surveying.

There are 2π radians in a full circle (approximately 6.283 radians), and thus there are 2000π (approx 6283) milliradians in a full circle. In some contexts, the milliradian unit is approximated to 6400 mils or 6000 mils to simplify calculations, but the actual value is closer to 6283 milliradians.