Mil to Second of Arc Converter
How to Convert Mils to Seconds of Arc
To convert from mils (NATO) to seconds of arc, multiply the mil value by 202.5. This conversion factor comes from the standardized NATO mil, which is slightly different from a true milliradian.
Seconds of Arc = Mils × 202.5
Understanding Mils
A mil (NATO) is equal to 1/6,400 of a circle. It was adopted by the US military during World War I as a simplified unit for artillery sights, replacing degrees and minutes. While similar to a milliradian (1/6,283 of a circle), the NATO mil was rounded for practical field use.
Understanding Seconds of Arc
A second of arc (″) is equal to 1/3,600 of one degree or 1/60 of one minute of arc. It's commonly used in astronomy, ballistics, and precision measurements where very small angles need to be measured accurately.