Convert Circle to Mil (cir to Mil)

Circle (cir) and Mil (Mil) are both units of angle. With the conversion form below, you can effortlessly and accurately convert circle to mil. This free online calculator tool makes it simple and easy to perform the conversion from cir unit to the Mil unit.

An angle is a measure of the rotation between two rays that share a common endpoint (vertex). The most common unit is the degree (°), where a full circle = 360°. The SI-derived unit is the radian (rad), where a full circle = 2π rad ≈ 6.2832 rad; one radian is the angle subtended at the centre of a circle by an arc equal in length to the radius. Other units include the gradian (grad) (400 grad = full circle) and the arcminute (′) and arcsecond (″), widely used in astronomy and navigation.

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A mil (military mil, also called NATO mil or angular mil) is a unit of angular measurement equal to 1/6,400 of a full circle, or approximately 0.05625 degrees. The mil was designed for military targeting and ballistics calculations, where 1 mil at 1,000 meters corresponds to approximately 1 meter of linear distance—making rapid field adjustments practical. Artillery spotters, surveyors, and firearms specialists use mils for angle measurements in targeting, reconnaissance, and precision work. The unit appears in rifle scope adjustments, military maps, and ballistic tables. Different military traditions have developed slightly different mil definitions (Soviet mil, Swedish mil), but NATO mil remains the most widely standardized version in international military and surveying contexts.