# ››Measurement unit: millisecond

Full name: millisecond

Plural form: milliseconds

Symbol: ms

Alternate spelling: millisec

Category type: time

Scale factor: 0.001

# ››SI unit: second

The SI base unit for time is the second.
1 second is equal to 1000 millisecond.

# ››Convert millisecond to another unit

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# ››Definition: Millisecond

The SI prefix "milli" represents a factor of 10-3, or in exponential notation, 1E-3.

So 1 millisecond = 10-3 arcseconds.

The definition of a second is as follows:

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.

# ››Sample conversions: millisecond

millisecond to tropical year
millisecond to microsecond
millisecond to synodic month
millisecond to tropical month
millisecond to minute
millisecond to draconic month
millisecond to week
millisecond to draconic year
millisecond to lunar year
millisecond to Gregorian month