How many millisecond in 1 year?
The answer is 31536000000.
We assume you are converting between millisecond and year.
You can view more details on each measurement unit:
millisecond or year
The SI base unit for time is the second.
1 second is equal to 1000 millisecond, or 3.17097919838E-8 year.
Note that rounding errors may occur, so always check the results.
Use this page to learn how to convert between milliseconds and years.
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You may also want to find out how many days are between two dates on the calendar. Use the date calculator to get your age in days or measure the duration of an event.
You can do the reverse unit conversion from year to millisecond, or enter any two units below:
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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.
A year is the time between two recurrences of an event related to the orbit of the Earth around the Sun. By extension, this can be applied to any planet: for example, a "Martian year" is a year on Mars.
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