How many nanosecond in 1 year?
The answer is 3.1556952E+16.
We assume you are converting between nanosecond and Gregorian year.
You can view more details on each measurement unit: nanosecond or
year
The SI base unit for time is the second.
1 second is equal to 1000000000 nanosecond, or 3.1688738506811E-8 year.
Note that rounding errors may occur, so always check the results.
Use this page to learn how to convert between nanoseconds and years.
Type in your own numbers in the form to convert the units!

Date difference between calendar days

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

The SI prefix "nano" represents a factor of
10^{-9}, or in exponential notation, 1E-9.

So 1 nanosecond = 10^{-9} 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.

Definition: Year

An average Gregorian year is 365.2425 days (52.1775 weeks, 8765.82 hours, 525949.2 minutes or 31556952 seconds). For this calendar, a common year is 365 days (8760 hours, 525600 minutes or 31536000 seconds), and a leap year is 366 days (8784 hours, 527040 minutes or 31622400 seconds). The 400-year cycle of the Gregorian calendar has 146097 days and hence exactly 20871 weeks.

a_{g} = a_g = 365.2425 days for the mean Gregorian year

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