| week | 1 wk | 2 wk | 3 wk | 4 wk | 5 wk | 6 wk | 7 wk | 8 wk | 9 wk | 10 wk | 11 wk | 12 wk | 13 wk | 14 wk | 15 wk | 16 wk | 17 wk | 18 wk | 19 wk | 20 wk | 21 wk | 22 wk | 23 wk | 24 wk | 25 wk | 26 wk | 27 wk | 28 wk | 29 wk | 30 wk | 31 wk | 32 wk | 33 wk | 34 wk | 35 wk | 36 wk | 37 wk | 38 wk | 39 wk | 40 wk | 41 wk | 42 wk | 43 wk | 44 wk | 45 wk | 46 wk | 47 wk | 48 wk | 49 wk | 50 wk | 51 wk | 52 wk | 53 wk | 54 wk | 55 wk | 56 wk | 57 wk | 58 wk | 59 wk | 60 wk | 61 wk | 62 wk | 63 wk | 64 wk | 65 wk | 66 wk | 67 wk | 68 wk | 69 wk | 70 wk | 71 wk | 72 wk | 73 wk | 74 wk | 75 wk | 76 wk | 77 wk | 78 wk | 79 wk | 80 wk | 81 wk | 82 wk | 83 wk | 84 wk | 85 wk | 86 wk | 87 wk | 88 wk | 89 wk | 90 wk | 91 wk | 92 wk | 93 wk | 94 wk | 95 wk | 96 wk | 97 wk | 98 wk | 99 wk | 100 wk |
| fortnight | 0.5 fn | 1 fn | 1.5 fn | 2 fn | 2.5 fn | 3 fn | 3.5 fn | 4 fn | 4.5 fn | 5 fn | 5.5 fn | 6 fn | 6.5 fn | 7 fn | 7.5 fn | 8 fn | 8.5 fn | 9 fn | 9.5 fn | 10 fn | 10.5 fn | 11 fn | 11.5 fn | 12 fn | 12.5 fn | 13 fn | 13.5 fn | 14 fn | 14.5 fn | 15 fn | 15.5 fn | 16 fn | 16.5 fn | 17 fn | 17.5 fn | 18 fn | 18.5 fn | 19 fn | 19.5 fn | 20 fn | 20.5 fn | 21 fn | 21.5 fn | 22 fn | 22.5 fn | 23 fn | 23.5 fn | 24 fn | 24.5 fn | 25 fn | 25.5 fn | 26 fn | 26.5 fn | 27 fn | 27.5 fn | 28 fn | 28.5 fn | 29 fn | 29.5 fn | 30 fn | 30.5 fn | 31 fn | 31.5 fn | 32 fn | 32.5 fn | 33 fn | 33.5 fn | 34 fn | 34.5 fn | 35 fn | 35.5 fn | 36 fn | 36.5 fn | 37 fn | 37.5 fn | 38 fn | 38.5 fn | 39 fn | 39.5 fn | 40 fn | 40.5 fn | 41 fn | 41.5 fn | 42 fn | 42.5 fn | 43 fn | 43.5 fn | 44 fn | 44.5 fn | 45 fn | 45.5 fn | 46 fn | 46.5 fn | 47 fn | 47.5 fn | 48 fn | 48.5 fn | 49 fn | 49.5 fn | 50 fn |
A week is a time unit equal to seven days.
| 1 weeks = 0.5 fortnights | 6 weeks = 3 fortnights |
| 2 weeks = 1 fortnights | 7 weeks = 3.5 fortnights |
| 3 weeks = 1.5 fortnights | 8 weeks = 4 fortnights |
| 4 weeks = 2 fortnights | 9 weeks = 4.5 fortnights |
| 5 weeks = 2.5 fortnights | 10 weeks = 5 fortnights |
A fortnight is a unit of time equal to 14 days (2 weeks). The word derives from the Old English: fēowertyne niht, meaning "fourteen nights".
| 1 fortnights = 2 weeks | 6 fortnights = 12 weeks |
| 2 fortnights = 4 weeks | 7 fortnights = 14 weeks |
| 3 fortnights = 6 weeks | 8 fortnights = 16 weeks |
| 4 fortnights = 8 weeks | 9 fortnights = 18 weeks |
| 5 fortnights = 10 weeks | 10 fortnights = 20 weeks |
| 1 weeks = 0.5 fortnights |
| 1 fortnights = 2 weeks |