To convert sidereal years to years, multiply the value by 1.00004. To go the other way, multiply years by 0.999962 to get sidereal years.
| Sidereal Years (sid yr) | Years (average) (yr) |
|---|---|
| 1 sid yr | 1.00004 yr |
| 2 sid yr | 2.00008 yr |
| 3 sid yr | 3.00011 yr |
| 4 sid yr | 4.00015 yr |
| 5 sid yr | 5.00019 yr |
| 6 sid yr | 6.00023 yr |
| 7 sid yr | 7.00027 yr |
| 8 sid yr | 8.0003 yr |
| 9 sid yr | 9.00034 yr |
| 10 sid yr | 10.0004 yr |
| 12 sid yr | 12.0005 yr |
| 14 sid yr | 14.0005 yr |
| 15 sid yr | 15.0006 yr |
| 20 sid yr | 20.0008 yr |
| 21 sid yr | 21.0008 yr |
| 24 sid yr | 24.0009 yr |
| 25 sid yr | 25.0009 yr |
| 30 sid yr | 30.0011 yr |
| 40 sid yr | 40.0015 yr |
| 50 sid yr | 50.0019 yr |
| 60 sid yr | 60.0023 yr |
| 75 sid yr | 75.0028 yr |
| 80 sid yr | 80.003 yr |
| 100 sid yr | 100.004 yr |
| 200 sid yr | 200.008 yr |
| 250 sid yr | 250.009 yr |
| 300 sid yr | 300.011 yr |
| 400 sid yr | 400.015 yr |
| 500 sid yr | 500.019 yr |
| 750 sid yr | 750.028 yr |
| 1,000 sid yr | 1,000.04 yr |
Sidereal year (sid yr). A sidereal year is 365.256363 days, one orbit of the Sun relative to the stars.
Year (yr). An average Gregorian year is 365.2425 days, allowing for leap years.
There are 1.00004 years in one sidereal year.
Multiply the number of sidereal years by 1.00004. For example, 10 sidereal years equal 10.0004 years.
One year equals 0.999962 sidereal years.
12.0005 years. Other common values: 5 sidereal years = 5.00019 years and 100 sidereal years = 100.004 years.