How many millidegree in 1 second? The answer is 0.27777777777778. We assume you are converting between millidegree and arcsecond. You can view more details on each measurement unit: millidegree or second The SI derived unit for angle is the radian. 1 radian is equal to 57295.779513082 millidegree, or 206264.8062471 second. Note that rounding errors may occur, so always check the results. Use this page to learn how to convert between millidegrees and arcseconds. Type in your own numbers in the form to convert the units!
1 millidegree to second = 3.6 second
5 millidegree to second = 18 second
10 millidegree to second = 36 second
15 millidegree to second = 54 second
20 millidegree to second = 72 second
25 millidegree to second = 90 second
30 millidegree to second = 108 second
40 millidegree to second = 144 second
50 millidegree to second = 180 second
You can do the reverse unit conversion from second to millidegree, or enter any two units below:
The SI prefix "milli" represents a factor of 10-3, or in exponential notation, 1E-3.
So 1 millidegree = 10-3 degrees.
The definition of a degree is as follows:
A degree (or in full degree of arc), usually symbolized by the symbol °, is a measurement of plane angles, or of a location along a great circle of a sphere (such as the Earth or the celestial sphere), representing 1/360 of a full rotation.
A second of arc or arcsecond is a unit of angular measurement which comprises one-sixtieth of an arcminute, or 1/3600 of a degree of arc or 1/1296000 (approximately 7.7×10-7) of a circle. It is the angular diameter of an object of 1 unit diameter at a distance of 360×60×60/(2pi) (approximately 206,265 units), such as (approximately) 1 cm at 2.1 km, or, directly from the definition, 1 astronomical unit at 1 parsec.
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