Convert Arcsecond to Milliradian

One ″ equals 0.004848136815 mrad. This converter allows you to easily convert between Arcsecond and Milliradian in real time.

Formula

″ × 0.004848136815 = mrad

Example: 1 ″ = 0.004848136815 mrad

What is Arcsecond?

The arcsecond is one-sixtieth of an arcminute, or one 3,600th of a degree. In astronomy, stellar parallax is measured in arcseconds, and one parsec (about 3.26 light-years) is defined as the distance at which a star shows a parallax of one arcsecond. In surveying, high-precision instruments achieve sub-arcsecond resolution. GPS coordinates expressed in degrees, minutes, and seconds use arcseconds for fine positional accuracy, where one arcsecond of latitude is approximately 31 meters on Earth's surface.

What is Milliradian?

The milliradian is one-thousandth of a radian, approximately 0.0573 degrees. It is widely used in military and shooting applications, where NATO standard scopes use milliradians for angular measurement. One mrad subtends approximately one meter at a distance of 1,000 meters, making range estimation intuitive. Laser beam divergence and optical aberrations are also often specified in milliradians.