# year (common) to year (Gregorian) conversion

Conversion number between year (common) [a, y, or yr] and year (Gregorian) [a, y, or yr] is 0.99933605755081. This means, that year (common) is smaller unit than year (Gregorian).

### Contents [show][hide] Switch to reverse conversion:
from year (Gregorian) to year (common) conversion

### Enter the number in year (common):

Decimal Fraction Exponential Expression
 [a, y, or yr]
eg.: 10.12345 or 1.123e5

Result in year (Gregorian)

?
 precision 0 1 2 3 4 5 6 7 8 9 [info] Decimal: Exponential:

### Calculation process of conversion value

• 1 year (common) = (exactly) (31536000) / (31556952) = 0.99933605755081 year (Gregorian)
• 1 year (Gregorian) = (exactly) (31556952) / (31536000) = 1.0006643835616 year (common)
• ? year (common) × (31536000  ("s"/"year (common)")) / (31556952  ("s"/"year (Gregorian)")) = ? year (Gregorian)

### High precision conversion

If conversion between year (common) to second and second to year (Gregorian) is exactly definied, high precision conversion from year (common) to year (Gregorian) is enabled.

Decimal places: (0-800)

year (common)
Result in year (Gregorian):
?
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### year (common) to year (Gregorian) conversion chart

 Start value: [year (common)] Step size [year (common)] How many lines? (max 100)

visual:
year (common)year (Gregorian)
00
109.9933605755081
2019.986721151016
3029.980081726524
4039.973442302032
5049.96680287754
6059.960163453048
7069.953524028556
8079.946884604064
9089.940245179572
10099.933605755081
110109.92696633059
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## Multiple conversion

Enter numbers in year (common) and click convert button.
One number per line.

Converted numbers in year (Gregorian):
Click to select all

## Details about year (common) and year (Gregorian) units:

Convert Year (common) to other unit:

### year (common)

Definition of year (common) unit: 365 d. The year commonly has 365 days (except the leap year)

Convert Year (Gregorian) to other unit:

### year (Gregorian)

Definition of year (Gregorian) unit: = 365.2425 d average. As the common year has 365 days, the Gregorian calendar with leap years compensate the deviation from the real, astronomical year. According to this calendar, every 4th year is a leap year, except for every 100th. But every 400th is a leap year. This means that there are 97 leap years in 400 year period. So according to Gregorian's calendar, one year has 365 + 97/400 days (average). This is not a perfect approach, but in 1000 year period, the defiation is only 0.3 days compared to the astronomical year. In the year 1582 Gregorian replaced the Julian calendar. ← Back to Time units

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