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Convert sidereal year to gregorian year

Here you can quickly calculate how many gregorian year fit in one sidereal year.

- scroll: formula · table · questions -

  • 1 = 1.000039
  • 1 = 0.999961

Sidereal year to gregorian year conversion table

sidereal year gregorian year
1 1.000039
2 2.000078
5 5.000194
10 10.000388
20 20.000776
50 50.001939
100 100.003879

Formula to convert sidereal year to gregorian year

To convert sidereal year to gregorian year, multiply by 1.000039.

1 = 1.000039
Example: 1 sidereal year = 1.000039 gregorian year

Common mistakes in time conversion

  • A year is not exactly 52 weeks: 365 days is 52 weeks plus one day, and a leap year 52 weeks plus two. That extra day is why the same date shifts one weekday each year. When spreading a yearly amount per week, use 52.18 weeks per year.
  • There are several year definitions: the Julian year is exactly 365.25 days, the Gregorian calendar year 365.2425, and the tropical year about 365.2422 days. For everyday use the differences are negligible, but they matter in astronomy, the light-year, for instance, is defined using the Julian year.

Quick sidereal year to/from gregorian year conversion quiz

Score: 0

147 gregorian year equals 147 sidereal year.

Correct answer: 147 gregorian year = 147 sidereal year.

23.2 gregorian year equals 23.2 sidereal year.

Correct answer: 23.2 gregorian year = 23.2 sidereal year.

93 gregorian year equals 93 sidereal year.

Correct answer: 93 gregorian year = 93 sidereal year.

115 sidereal year equals 115 gregorian year.

Correct answer: 115 sidereal year = 115 gregorian year.

14.4 gregorian year equals 14.4 sidereal year.

Correct answer: 14.4 gregorian year = 14.4 sidereal year.

More conversions in time