To convert months to sidereal years, multiply the value by 0.0833302. To go the other way, multiply sidereal years by 12.0005 to get months.
| Months (average) (mo) | Sidereal Years (sid yr) |
|---|---|
| 1 mo | 0.0833302 sid yr |
| 2 mo | 0.16666 sid yr |
| 3 mo | 0.249991 sid yr |
| 4 mo | 0.333321 sid yr |
| 5 mo | 0.416651 sid yr |
| 6 mo | 0.499981 sid yr |
| 7 mo | 0.583311 sid yr |
| 8 mo | 0.666641 sid yr |
| 9 mo | 0.749972 sid yr |
| 10 mo | 0.833302 sid yr |
| 12 mo | 0.999962 sid yr |
| 14 mo | 1.16662 sid yr |
| 15 mo | 1.24995 sid yr |
| 20 mo | 1.6666 sid yr |
| 21 mo | 1.74993 sid yr |
| 24 mo | 1.99992 sid yr |
| 25 mo | 2.08325 sid yr |
| 30 mo | 2.49991 sid yr |
| 40 mo | 3.33321 sid yr |
| 50 mo | 4.16651 sid yr |
| 60 mo | 4.99981 sid yr |
| 75 mo | 6.24976 sid yr |
| 80 mo | 6.66641 sid yr |
| 100 mo | 8.33302 sid yr |
| 200 mo | 16.666 sid yr |
| 250 mo | 20.8325 sid yr |
| 300 mo | 24.9991 sid yr |
| 400 mo | 33.3321 sid yr |
| 500 mo | 41.6651 sid yr |
| 750 mo | 62.4976 sid yr |
| 1,000 mo | 83.3302 sid yr |
Month (mo). An average Gregorian month is 30.436875 days (1/12 of 365.2425 days).
Sidereal year (sid yr). A sidereal year is 365.256363 days, one orbit of the Sun relative to the stars.
There are 0.0833302 sidereal years in one month.
Multiply the number of months by 0.0833302. For example, 10 months equal 0.833302 sidereal years.
One sidereal year equals 12.0005 months.
0.999962 sidereal years. Other common values: 5 months = 0.416651 sidereal years and 100 months = 8.33302 sidereal years.