›› Convert Gregorian year to sidereal year

sidereal year

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›› More information from the unit converter

How many year in 1 sidereal year? The answer is 1.0000379473911.
We assume you are converting between Gregorian year and sidereal year.
You can view more details on each measurement unit:
year or sidereal year
The SI base unit for time is the second.
1 second is equal to 3.1688738506811E-8 year, or 3.1687536047488E-8 sidereal year.
Note that rounding errors may occur, so always check the results.
Use this page to learn how to convert between years and years.
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.

›› Quick conversion chart of year to sidereal year

1 year to sidereal year = 0.99996 sidereal year

5 year to sidereal year = 4.99981 sidereal year

10 year to sidereal year = 9.99962 sidereal year

20 year to sidereal year = 19.99924 sidereal year

30 year to sidereal year = 29.99886 sidereal year

40 year to sidereal year = 39.99848 sidereal year

50 year to sidereal year = 49.9981 sidereal year

75 year to sidereal year = 74.99715 sidereal year

100 year to sidereal year = 99.99621 sidereal year

›› Want other units?

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

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›› Common time conversions

year to millisecond
year to second
year to nanosecond
year to decade
year to fortnight
year to day
year to millennium
year to quarter
year to hour
year to week

›› 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.

ag = a_g = 365.2425 days for the mean Gregorian year

›› Definition: Year

A sidereal year (from Latin sidus "asterism, star") is the time taken by the Earth to orbit the Sun once with respect to the fixed stars. Hence it is also the time taken for the Sun to return to the same position with respect to the fixed stars after apparently travelling once around the ecliptic. It equals 365.25636 SI days for the J2000.0 epoch.

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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!