**Radians** = **Milliradians [US WW2]** / 636.61828368

## About US WW2 Milliradians

During World War II, milliradians (mils) and radians played a crucial role in various military operations. Milliradians are a unit of angular measurement commonly used in artillery and long-range shooting. They are derived from the concept of a radian, which is the angle subtended at the center of a circle by an arc equal in length to the radius of the circle. A milliradian is equal to one-thousandth of a radian, making it a more precise unit for measuring small angles.

In the context of World War II, milliradians were used extensively by artillery units to calculate the elevation and azimuth angles required to accurately hit targets at long distances. Artillery gunners would use specialized instruments, such as the M2A2 aiming circle, to measure the angle between the target and the gun. By converting this angle into milliradians, gunners could then adjust the elevation and direction of the gun to ensure accurate fire. This was particularly important in situations where targets were located far away or obscured by terrain, as milliradians allowed for precise adjustments to be made, increasing the chances of hitting the target successfully.

There are 4,000 US WW2 milliradians in a full circle.

## About Radians

Radians are a unit of measurement used in mathematics and physics to quantify angles. Unlike degrees, which divide a circle into 360 equal parts, radians divide a circle into 2π (approximately 6.28) equal parts. This unit is particularly useful in trigonometry and calculus, as it simplifies many mathematical calculations involving angles.

The concept of radians is based on the relationship between the length of an arc and the radius of a circle. One radian is defined as the angle subtended by an arc that is equal in length to the radius of the circle. In other words, if we were to take a circle with a radius of 1 unit and measure an arc along its circumference that is also 1 unit long, the angle formed at the center of the circle would be 1 radian.

Radians are advantageous because they allow for more straightforward calculations involving angles in trigonometric functions and calculus. Many mathematical formulas and equations involving angles become simpler when expressed in radians. Additionally, radians are dimensionless, meaning they do not have any units associated with them. This property makes it easier to perform calculations and conversions involving angles in various systems of measurement.