Circles to Mils (NATO) Converter

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

Result in Mils:

1 cir = 6,400 mil

Do you want to convert mils to circles?

How to Convert Circles to Mils

To convert a measurement in circles to a measurement in mils, multiply the angle by the following conversion ratio: 6,400 mils/circle.

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

mils = circles × 6,400

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

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

How Many Mils Are in a Circle?

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

1 cir = 6,400 mil

What Is a Circle?

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.

A circle is more commonly used to describe a round, symmetrical shape with no corners or edges than it is to describe plane angle. The shape is described by its radius and circumference.

What Is a Mil?

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 can be abbreviated as mil; for example, 1 mil can be written as 1 mil.

Circle to Mil Conversion Table

Table showing various circle measurements converted to mils.
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