## ››Convert Gregorian year to decade

 Did you mean to convert Gregorian year Julian year tropical year sidereal year anomalistic year draconic year lunar year Gaussian year to decade

We assume you are converting between Gregorian year and decade.
You can view more details on each measurement unit:
The SI base unit for time is the second.
1 second is equal to 3.1688738506811E-8 year, or 3.1709791983765E-9 decade.
Note that rounding errors may occur, so always check the results.
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.

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

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## ››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