| fortnight | 1 fn | 2 fn | 3 fn | 4 fn | 5 fn | 6 fn | 7 fn | 8 fn | 9 fn | 10 fn | 11 fn | 12 fn | 13 fn | 14 fn | 15 fn | 16 fn | 17 fn | 18 fn | 19 fn | 20 fn | 21 fn | 22 fn | 23 fn | 24 fn | 25 fn | 26 fn | 27 fn | 28 fn | 29 fn | 30 fn | 31 fn | 32 fn | 33 fn | 34 fn | 35 fn | 36 fn | 37 fn | 38 fn | 39 fn | 40 fn | 41 fn | 42 fn | 43 fn | 44 fn | 45 fn | 46 fn | 47 fn | 48 fn | 49 fn | 50 fn | 51 fn | 52 fn | 53 fn | 54 fn | 55 fn | 56 fn | 57 fn | 58 fn | 59 fn | 60 fn | 61 fn | 62 fn | 63 fn | 64 fn | 65 fn | 66 fn | 67 fn | 68 fn | 69 fn | 70 fn | 71 fn | 72 fn | 73 fn | 74 fn | 75 fn | 76 fn | 77 fn | 78 fn | 79 fn | 80 fn | 81 fn | 82 fn | 83 fn | 84 fn | 85 fn | 86 fn | 87 fn | 88 fn | 89 fn | 90 fn | 91 fn | 92 fn | 93 fn | 94 fn | 95 fn | 96 fn | 97 fn | 98 fn | 99 fn | 100 fn |
| month | 0.4599688 mo | 0.9199375 mo | 1.3799063 mo | 1.8398750 mo | 2.2998438 mo | 2.7598125 mo | 3.2197813 mo | 3.6797501 mo | 4.1397188 mo | 4.5996876 mo | 5.0596563 mo | 5.5196251 mo | 5.9795938 mo | 6.4395626 mo | 6.8995314 mo | 7.3595001 mo | 7.8194689 mo | 8.2794376 mo | 8.7394064 mo | 9.1993751 mo | 9.6593439 mo | 10.1193126 mo | 10.5792814 mo | 11.0392502 mo | 11.4992189 mo | 11.9591877 mo | 12.4191564 mo | 12.8791252 mo | 13.3390939 mo | 13.7990627 mo | 14.2590315 mo | 14.7190002 mo | 15.1789690 mo | 15.6389377 mo | 16.0989065 mo | 16.5588752 mo | 17.0188440 mo | 17.4788128 mo | 17.9387815 mo | 18.3987503 mo | 18.8587190 mo | 19.3186878 mo | 19.7786565 mo | 20.2386253 mo | 20.6985941 mo | 21.1585628 mo | 21.6185316 mo | 22.0785003 mo | 22.5384691 mo | 22.9984378 mo | 23.4584066 mo | 23.9183753 mo | 24.3783441 mo | 24.8383129 mo | 25.2982816 mo | 25.7582504 mo | 26.2182191 mo | 26.6781879 mo | 27.1381566 mo | 27.5981254 mo | 28.0580942 mo | 28.5180629 mo | 28.9780317 mo | 29.4380004 mo | 29.8979692 mo | 30.3579379 mo | 30.8179067 mo | 31.2778755 mo | 31.7378442 mo | 32.1978130 mo | 32.6577817 mo | 33.1177505 mo | 33.5777192 mo | 34.0376880 mo | 34.4976568 mo | 34.9576255 mo | 35.4175943 mo | 35.8775630 mo | 36.3375318 mo | 36.7975005 mo | 37.2574693 mo | 37.7174381 mo | 38.1774068 mo | 38.6373756 mo | 39.0973443 mo | 39.5573131 mo | 40.0172818 mo | 40.4772506 mo | 40.9372193 mo | 41.3971881 mo | 41.8571569 mo | 42.3171256 mo | 42.7770944 mo | 43.2370631 mo | 43.6970319 mo | 44.1570006 mo | 44.6169694 mo | 45.0769382 mo | 45.5369069 mo | 45.9968757 mo |
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".
| Name of unit | Symbol | Definition | Relation to SI units | Unit System |
|---|---|---|---|---|
| fortnight | fn | ≡ 2 wk | = 1.2096 Ms | Metric system SI |
| fortnights | months | fortnights | months |
|---|---|---|---|
| 1 | ≈ 0.45996875672867 | 6 | ≈ 2.759812540372 |
| 2 | ≈ 0.91993751345735 | 7 | ≈ 3.2197812971007 |
| 3 | ≈ 1.379906270186 | 8 | ≈ 3.6797500538294 |
| 4 | ≈ 1.8398750269147 | 9 | ≈ 4.1397188105581 |
| 5 | ≈ 2.2998437836434 | 10 | ≈ 4.5996875672867 |
A month is a unit of time, used with calendars, which is approximately as long as a natural period related to the motion of the Moon; month and Moon are cognates.
| Name of unit | Symbol | Definition | Relation to SI units | Unit System |
|---|---|---|---|---|
| month | mo | = 30.436875 d | ≈ 2.6297 Ms | Metric system SI |
| months | fortnights | months | fortnights |
|---|---|---|---|
| 1 | ≈ 2.1740607060185 | 6 | ≈ 13.044364236111 |
| 2 | ≈ 4.348121412037 | 7 | ≈ 15.21842494213 |
| 3 | ≈ 6.5221821180556 | 8 | ≈ 17.392485648148 |
| 4 | ≈ 8.6962428240741 | 9 | ≈ 19.566546354167 |
| 5 | ≈ 10.870303530093 | 10 | ≈ 21.740607060185 |
| fortnights | months |
|---|---|
| 1 | ≈ 0.4599688 |
| 2.1740607 | ≈ 1 |
| Symbol | Definition |
|---|---|
| ≡ | exactly equal |
| ≈ | approximately equal to |
| = | equal to |
| digits | indicates that digits repeat infinitely (e.g. 8.294 369 corresponds to 8.294 369 369 369 369 …) |