**Full name:** microsecond

**Plural form:** microseconds

**Symbol:** us

**Alternate spelling:** microsec

**Category type:** time

**Scale factor:** 1.0E-6

The SI base unit for time is the second.

1 second is equal to 1000000 microsecond.

Valid units must be of the **time** type.

You can use this form to select from known units:

The SI prefix "micro" represents a factor of
10^{-6}, or in exponential notation, 1E-6.

So 1 microsecond = 10^{-6} 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.

microsecond to Julian month

microsecond to hour

microsecond to tropical month

microsecond to draconic year

microsecond to Gregorian year

microsecond to Julian year

microsecond to lunar year

microsecond to millisecond

microsecond to nanosecond

microsecond to quarter