Convert Julian years to seconds

Explanation

From this page you can convert Julian years to seconds (or jy to s) simply, by using the application above.

In case you are wondering, to convert from Julian years to seconds you need to multiply by 31557600. This factor is calculated using the respective definitions of the two units you can find below.

Formula

1 jy=31557600 s

Julian yearsjy

dimension	time
symbol	jy

The Julian year (jy) is a unit of measurement of time.

The unit is used in astronomy preferably to the tropical year because of its fixed length.

Definition of the Julian year

The unit is defined by the International Astronomical Union as exactly 365.25 days of 86 400 seconds each. This was the average length of a year in the Julian calendar, hence the name Julian year.

Value in terms of the SI

One Julian year is equal to 31557600 seconds.

History

The Julian calendar was the predecessor of the Gregorian calendar.

It was a pretty simple calendar with a common year of 365 days and a leap year of 366 days once every four years. The average Julian year over a four-year period was therefore 365.25 days.

The Julian calendar is slightly longer than the tropical year and gains a day every 128 years.

secondss

dimension	time
system	International system of units (SI)
symbol	s

The second (s) is the base unit of time in the International System of Units.

Definition of the second

It is defined by taking the fixed numerical value of the caesium frequency ∆ν_Cs, the unperturbed ground-state hyperfine transition frequency of the caesium-133 atom, to be 9 192 631 770 when expressed in the unit Hz, which is equal to s^–1.

From the BIPM: Unit of time

Equivalences

One second is equivalent to:

Some Facts

As of 2021, the world record for the 100 meters dash is held by the Jamaican Usain Bolt with a time of 9.58 seconds.

SI time units

picosecond	ps	0.000 000 000 001
nanosecond	ns	0.000 000 001
microsecond	µs	0.000 001
millisecond	ms	0.001
second	s	1
kilosecond	ks	1000
megasecond	Ms	1 000 000
gigasecond	Gs	1 000 000 000
terasecond	Ts	1 000 000 000 000

The International System of Units

The International System of Units or SI (from the French Système international (d'unité)), also called metric system in the U.S., is a coherent system of units that was published 1960. It is official in nearly every country.

The General Conference on Weights and Measures (Conférence générale des poids et mesures) is tasked with overseeing the SI.