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Convert sidereal year to tropical year

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

- scroll: formula · table · questions -

  • 1 = 1.000039
  • 1 = 0.999961

Sidereal year to tropical year conversion table

sidereal year tropical 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 tropical year

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

1 = 1.000039
Example: 1 sidereal year = 1.000039 tropical year

Common mistakes in time conversion

  • 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 tropical year conversion quiz

Score: 0

3.4 tropical year equals 3.06 sidereal year.

Correct answer: 3.4 tropical year = 3.4 sidereal year.

19.7 tropical year equals 19.7 sidereal year.

Correct answer: 19.7 tropical year = 19.7 sidereal year.

22 sidereal year equals 18.7 tropical year.

Correct answer: 22 sidereal year = 22 tropical year.

More conversions in time