| month | 1 mo | 2 mo | 3 mo | 4 mo | 5 mo | 6 mo | 7 mo | 8 mo | 9 mo | 10 mo | 11 mo | 12 mo | 13 mo | 14 mo | 15 mo | 16 mo | 17 mo | 18 mo | 19 mo | 20 mo | 21 mo | 22 mo | 23 mo | 24 mo | 25 mo | 26 mo | 27 mo | 28 mo | 29 mo | 30 mo | 31 mo | 32 mo | 33 mo | 34 mo | 35 mo | 36 mo | 37 mo | 38 mo | 39 mo | 40 mo | 41 mo | 42 mo | 43 mo | 44 mo | 45 mo | 46 mo | 47 mo | 48 mo | 49 mo | 50 mo | 51 mo | 52 mo | 53 mo | 54 mo | 55 mo | 56 mo | 57 mo | 58 mo | 59 mo | 60 mo | 61 mo | 62 mo | 63 mo | 64 mo | 65 mo | 66 mo | 67 mo | 68 mo | 69 mo | 70 mo | 71 mo | 72 mo | 73 mo | 74 mo | 75 mo | 76 mo | 77 mo | 78 mo | 79 mo | 80 mo | 81 mo | 82 mo | 83 mo | 84 mo | 85 mo | 86 mo | 87 mo | 88 mo | 89 mo | 90 mo | 91 mo | 92 mo | 93 mo | 94 mo | 95 mo | 96 mo | 97 mo | 98 mo | 99 mo | 100 mo |
| fortnight | 2.1740607 fn | 4.3481214 fn | 6.5221821 fn | 8.6962428 fn | 10.8703035 fn | 13.0443642 fn | 15.2184249 fn | 17.3924856 fn | 19.5665464 fn | 21.7406071 fn | 23.9146678 fn | 26.0887285 fn | 28.2627892 fn | 30.4368499 fn | 32.6109106 fn | 34.7849713 fn | 36.9590320 fn | 39.1330927 fn | 41.3071534 fn | 43.4812141 fn | 45.6552748 fn | 47.8293355 fn | 50.0033962 fn | 52.1774569 fn | 54.3515177 fn | 56.5255784 fn | 58.6996391 fn | 60.8736998 fn | 63.0477605 fn | 65.2218212 fn | 67.3958819 fn | 69.5699426 fn | 71.7440033 fn | 73.9180640 fn | 76.0921247 fn | 78.2661854 fn | 80.4402461 fn | 82.6143068 fn | 84.7883675 fn | 86.9624282 fn | 89.1364889 fn | 91.3105497 fn | 93.4846104 fn | 95.6586711 fn | 97.8327318 fn | 100.0067925 fn | 102.1808532 fn | 104.3549139 fn | 106.5289746 fn | 108.7030353 fn | 110.8770960 fn | 113.0511567 fn | 115.2252174 fn | 117.3992781 fn | 119.5733388 fn | 121.7473995 fn | 123.9214602 fn | 126.0955209 fn | 128.2695817 fn | 130.4436424 fn | 132.6177031 fn | 134.7917638 fn | 136.9658245 fn | 139.1398852 fn | 141.3139459 fn | 143.4880066 fn | 145.6620673 fn | 147.8361280 fn | 150.0101887 fn | 152.1842494 fn | 154.3583101 fn | 156.5323708 fn | 158.7064315 fn | 160.8804922 fn | 163.0545530 fn | 165.2286137 fn | 167.4026744 fn | 169.5767351 fn | 171.7507958 fn | 173.9248565 fn | 176.0989172 fn | 178.2729779 fn | 180.4470386 fn | 182.6210993 fn | 184.7951600 fn | 186.9692207 fn | 189.1432814 fn | 191.3173421 fn | 193.4914028 fn | 195.6654635 fn | 197.8395242 fn | 200.0135850 fn | 202.1876457 fn | 204.3617064 fn | 206.5357671 fn | 208.7098278 fn | 210.8838885 fn | 213.0579492 fn | 215.2320099 fn | 217.4060706 fn |
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.
| 1 months ≈ 2.1740607060185 fortnights | 6 months ≈ 13.044364236111 fortnights |
| 2 months ≈ 4.348121412037 fortnights | 7 months ≈ 15.21842494213 fortnights |
| 3 months ≈ 6.5221821180556 fortnights | 8 months ≈ 17.392485648148 fortnights |
| 4 months ≈ 8.6962428240741 fortnights | 9 months ≈ 19.566546354167 fortnights |
| 5 months ≈ 10.870303530093 fortnights | 10 months ≈ 21.740607060185 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 ≈ 0.45996875672867 months | 6 fortnights ≈ 2.759812540372 months |
| 2 fortnights ≈ 0.91993751345735 months | 7 fortnights ≈ 3.2197812971007 months |
| 3 fortnights ≈ 1.379906270186 months | 8 fortnights ≈ 3.6797500538294 months |
| 4 fortnights ≈ 1.8398750269147 months | 9 fortnights ≈ 4.1397188105581 months |
| 5 fortnights ≈ 2.2998437836434 months | 10 fortnights ≈ 4.5996875672867 months |
| 1 months ≈ 2.1740607 fortnights |
| 1 fortnights ≈ 0.4599688 months |