How many second in 1 millisecond?
The answer is 0.001.

We assume you are converting between **second** and **millisecond**.

You can view more details on each measurement unit:

second or
millisecond

The SI base unit for **time** is the second.

1 second is equal to 1000 millisecond.

Note that rounding errors may occur, so always check the results.

Use this page to learn how to convert between seconds and milliseconds.

Type in your own numbers in the form to convert the units!

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to get your age in days or measure the duration of an event.

1 second to millisecond = 1000 millisecond

2 second to millisecond = 2000 millisecond

3 second to millisecond = 3000 millisecond

4 second to millisecond = 4000 millisecond

5 second to millisecond = 5000 millisecond

6 second to millisecond = 6000 millisecond

7 second to millisecond = 7000 millisecond

8 second to millisecond = 8000 millisecond

9 second to millisecond = 9000 millisecond

10 second to millisecond = 10000 millisecond

You can do the reverse unit conversion from millisecond to second, or enter any two units below:

second to quarter

second to week

second to nanosecond

second to millennium

second to microsecond

second to fortnight

second to decade

second to year

second to hour

second to century

The second (symbol s) is a unit for time, and one of seven SI base units. It is defined as the duration of 9,192,631,770 periods of the radiation corresponding to the transition between the two hyperfine levels of the ground state of the caesium-133 atom at zero kelvins.

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.

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