Mils (NATO) Conversion

Protractors are often used to measure angle

The mil is a unit used to measure angle. Use one of the conversion calculators below to convert to another unit of measure, or read on to learn more about mils (NATO).

Mil Conversion Calculators

Choose a unit of angle to convert to.

Convert mils (NATO) to radians
1 mil is equal to 0.000982 radians
Convert mils (NATO) to milliradians
1 mil is equal to 0.981748 milliradians
Convert mils (NATO) to degrees
1 mil is equal to 0.05625 degrees
Convert mils (NATO) to minutes of arc
1 mil is equal to 3.375 minutes of arc
Convert mils (NATO) to seconds of arc
1 mil is equal to 202.5 seconds of arc
Convert mils (NATO) to gradians
1 mil is equal to 0.0625 gradians
Convert mils (NATO) to revolutions
1 mil is equal to 0.000156 revolutions
Convert mils (NATO) to circles
1 mil is equal to 0.000156 circles

Mil Definition and Usage

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.

Mils (NATO) Measurement Conversion Table

Common mil values and equivalent imperial and metric angle measurements
mils (NATO) radians milliradians degrees minutes of arc seconds of arc gradians revolutions circles
1 mil 0.000982 rad 0.981748 mrad 0.05625° 3.375' 202.5" 0.0625g 0.000156 r 0.000156 cir
2 mil 0.001963 rad 1.963495 mrad 0.1125° 6.75' 405" 0.125g 0.000313 r 0.000313 cir
3 mil 0.002945 rad 2.945243 mrad 0.16875° 10.125' 607.5" 0.1875g 0.000469 r 0.000469 cir
4 mil 0.003927 rad 3.926991 mrad 0.225° 13.5' 810" 0.25g 0.000625 r 0.000625 cir
5 mil 0.004909 rad 4.908739 mrad 0.28125° 16.875' 1,013" 0.3125g 0.000781 r 0.000781 cir
6 mil 0.00589 rad 5.890486 mrad 0.3375° 20.25' 1,215" 0.375g 0.000938 r 0.000938 cir
7 mil 0.006872 rad 6.872234 mrad 0.39375° 23.625' 1,418" 0.4375g 0.001094 r 0.001094 cir
8 mil 0.007854 rad 7.853982 mrad 0.45° 27' 1,620" 0.5g 0.00125 r 0.00125 cir
9 mil 0.008836 rad 8.835729 mrad 0.50625° 30.375' 1,823" 0.5625g 0.001406 r 0.001406 cir
10 mil 0.009817 rad 9.817477 mrad 0.5625° 33.75' 2,025" 0.625g 0.001563 r 0.001563 cir
11 mil 0.010799 rad 10.799225 mrad 0.61875° 37.125' 2,228" 0.6875g 0.001719 r 0.001719 cir
12 mil 0.011781 rad 11.780972 mrad 0.675° 40.5' 2,430" 0.75g 0.001875 r 0.001875 cir
13 mil 0.012763 rad 12.76272 mrad 0.73125° 43.875' 2,633" 0.8125g 0.002031 r 0.002031 cir
14 mil 0.013744 rad 13.744468 mrad 0.7875° 47.25' 2,835" 0.875g 0.002188 r 0.002188 cir
15 mil 0.014726 rad 14.726216 mrad 0.84375° 50.625' 3,038" 0.9375g 0.002344 r 0.002344 cir
16 mil 0.015708 rad 15.707963 mrad 0.9° 54' 3,240" 1g 0.0025 r 0.0025 cir
17 mil 0.01669 rad 16.689711 mrad 0.95625° 57.375' 3,443" 1.0625g 0.002656 r 0.002656 cir
18 mil 0.017671 rad 17.671459 mrad 1.0125° 60.75' 3,645" 1.125g 0.002813 r 0.002813 cir
19 mil 0.018653 rad 18.653206 mrad 1.06875° 64.125' 3,848" 1.1875g 0.002969 r 0.002969 cir
20 mil 0.019635 rad 19.634954 mrad 1.125° 67.5' 4,050" 1.25g 0.003125 r 0.003125 cir