# ››Convert year to millisecond

year
millisecond

How many year in 1 millisecond? The answer is 3.17097919838E-11.
We assume you are converting between year and millisecond.
You can view more details on each measurement unit:
year or millisecond
The SI base unit for time is the second.
1 second is equal to 3.17097919838E-8 year, or 1000 millisecond.
Note that rounding errors may occur, so always check the results.
Use this page to learn how to convert between years and milliseconds.
Type in your own numbers in the form to convert the units!

# ››Date difference between calendar days

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.

# ››Want other units?

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

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# ››Definition: Year

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.

# ››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.

# ››Metric conversions and more

ConvertUnits.com provides an online conversion calculator for all types of measurement units. You can find metric conversion tables for SI units, as well as English units, currency, and other data. Type in unit symbols, abbreviations, or full names for units of length, area, mass, pressure, and other types. Examples include mm, inch, 100 kg, US fluid ounce, 6'3", 10 stone 4, cubic cm, metres squared, grams, moles, feet per second, and many more!