Circles to Mils (NATO) Conversion

Enter the angle in circles below to get the value converted to mils (NATO).

Results in Mils (NATO):
Loading content.
1 cir = 6,400 mil

How to Convert Circles to Mils (NATO)

Protractors are often used to measure angle

To convert a circle measurement to a mil measurement, multiply the angle by the conversion ratio.

Since one circle is equal to 6,400 mils (NATO), you can use this simple formula to convert:

mils (NATO) = circles × 6,400

The angle in mils (NATO) is equal to the circles multiplied by 6,400.

For example, here's how to convert 5 circles to mils (NATO) using the formula above.
5 cir = (5 × 6,400) = 32,000 mil

How Many Mils (NATO) are in a Circle?

There are 6,400 mils (NATO) in a circle, which is why we use this value in the formula above.

1 cir = 6,400 mil

Circles and mils (NATO) are both units used to measure angle. Keep reading to learn more about each unit of measure.


A circle is the equivalent of 1 revolution around a circle, or 360°.

A circle is sometimes also referred to as a revolution. Circles can be abbreviated as cir; for example, 1 circle can be written as 1 cir.

Mils (NATO)

A mil, short for milliradian, is equal to 1/6,400 of a circle. The mil used by the US military and NATO forces is slightly different than the true value of a milliradian, which is equal to 1/6,283 of a circle.

During World War I the US adopted what is now the NATO mil to replace degrees and minutes for use in artillery sights. They opted to round mils to 6,400 per circle for simplicity at the time. Today, the mil is commonly used to measure adjustment of sights and scopes of firearms.

There is rightfully much confusion as a result of the mil adopted by the US military and NATO being slightly different than the milliradian.

A mil is sometimes also referred to as an angular mil. Mils (NATO) can be abbreviated as mil; for example, 1 mil can be written as 1 mil.

Circle to Mil Conversion Table

Circle measurements converted to mils (NATO)
Circles Mils (NATO)
0.001 cir 6.4 mil
0.002 cir 12.8 mil
0.003 cir 19.2 mil
0.004 cir 25.6 mil
0.005 cir 32 mil
0.006 cir 38.4 mil
0.007 cir 44.8 mil
0.008 cir 51.2 mil
0.009 cir 57.6 mil
0.01 cir 64 mil
0.02 cir 128 mil
0.03 cir 192 mil
0.04 cir 256 mil
0.05 cir 320 mil
0.06 cir 384 mil
0.07 cir 448 mil
0.08 cir 512 mil
0.09 cir 576 mil
0.1 cir 640 mil
0.2 cir 1,280 mil
0.3 cir 1,920 mil
0.4 cir 2,560 mil
0.5 cir 3,200 mil
0.6 cir 3,840 mil
0.7 cir 4,480 mil
0.8 cir 5,120 mil
0.9 cir 5,760 mil
1 cir 6,400 mil