**Full name:** Gregorian year

**Plural form:** years

**Symbol:** yr

**Alternate spelling:** yrs

**Category type:** time

**Scale factor:** 31556952

Gregorian year

Julian year

tropical year

sidereal year

anomalistic year

draconic year

lunar year

Gaussian year

The SI base unit for time is the second.

1 second is equal to 3.1688738506811E-8 year.

Valid units must be of the **time** type.

You can use this form to select from known units:

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

year to Gregorian year

year to Julian month

year to lunar year

year to tropical year

year to quarter

year to anomalistic month

year to synodic month

year to millennium

year to nanosecond

year to hour