To convert fortnights to sidereal days, multiply the value by 14.0383. To go the other way, multiply sidereal days by 0.0712335 to get fortnights.
| Fortnights (fn) | Sidereal Days (sid d) |
|---|---|
| 1 fn | 14.0383 sid d |
| 2 fn | 28.0767 sid d |
| 3 fn | 42.115 sid d |
| 4 fn | 56.1533 sid d |
| 5 fn | 70.1917 sid d |
| 6 fn | 84.23 sid d |
| 7 fn | 98.2683 sid d |
| 8 fn | 112.307 sid d |
| 9 fn | 126.345 sid d |
| 10 fn | 140.383 sid d |
| 12 fn | 168.46 sid d |
| 14 fn | 196.537 sid d |
| 15 fn | 210.575 sid d |
| 20 fn | 280.767 sid d |
| 21 fn | 294.805 sid d |
| 24 fn | 336.92 sid d |
| 25 fn | 350.958 sid d |
| 30 fn | 421.15 sid d |
| 40 fn | 561.533 sid d |
| 50 fn | 701.917 sid d |
| 60 fn | 842.3 sid d |
| 75 fn | 1,052.87 sid d |
| 80 fn | 1,123.07 sid d |
| 100 fn | 1,403.83 sid d |
| 200 fn | 2,807.67 sid d |
| 250 fn | 3,509.58 sid d |
| 300 fn | 4,211.5 sid d |
| 400 fn | 5,615.33 sid d |
| 500 fn | 7,019.17 sid d |
| 750 fn | 10,528.7 sid d |
| 1,000 fn | 14,038.3 sid d |
Fortnight (fn). A fortnight is 14 days (two weeks).
Sidereal day (sid d). A sidereal day (23 h 56 min 4.09 s) is one rotation of the Earth relative to the stars.
There are 14.0383 sidereal days in one fortnight.
Multiply the number of fortnights by 14.0383. For example, 10 fortnights equal 140.383 sidereal days.
One sidereal day equals 0.0712335 fortnights.
168.46 sidereal days. Other common values: 5 fortnights = 70.1917 sidereal days and 100 fortnights = 1,403.83 sidereal days.