| 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 |
| decisecond | 12 096 000 ds | 24 192 000 ds | 36 288 000 ds | 48 384 000 ds | 60 480 000 ds | 72 576 000 ds | 84 672 000 ds | 96 768 000 ds | 108 864 000 ds | 120 960 000 ds | 133 056 000 ds | 145 152 000 ds | 157 248 000 ds | 169 344 000 ds | 181 440 000 ds | 193 536 000 ds | 205 632 000 ds | 217 728 000 ds | 229 824 000 ds | 241 920 000 ds | 254 016 000 ds | 266 112 000 ds | 278 208 000 ds | 290 304 000 ds | 302 400 000 ds | 314 496 000 ds | 326 592 000 ds | 338 688 000 ds | 350 784 000 ds | 362 880 000 ds | 374 976 000 ds | 387 072 000 ds | 399 168 000 ds | 411 264 000 ds | 423 360 000 ds | 435 456 000 ds | 447 552 000 ds | 459 648 000 ds | 471 744 000 ds | 483 840 000 ds | 495 936 000 ds | 508 032 000 ds | 520 128 000 ds | 532 224 000 ds | 544 320 000 ds | 556 416 000 ds | 568 512 000 ds | 580 608 000 ds | 592 704 000 ds | 604 800 000 ds | 616 896 000 ds | 628 992 000 ds | 641 088 000 ds | 653 184 000 ds | 665 280 000 ds | 677 376 000 ds | 689 472 000 ds | 701 568 000 ds | 713 664 000 ds | 725 760 000 ds | 737 856 000 ds | 749 952 000 ds | 762 048 000 ds | 774 144 000 ds | 786 240 000 ds | 798 336 000 ds | 810 432 000 ds | 822 528 000 ds | 834 624 000 ds | 846 720 000 ds | 858 816 000 ds | 870 912 000 ds | 883 008 000 ds | 895 104 000 ds | 907 200 000 ds | 919 296 000 ds | 931 392 000 ds | 943 488 000 ds | 955 584 000 ds | 967 680 000 ds | 979 776 000 ds | 991 872 000 ds | 1 003 968 000 ds | 1 016 064 000 ds | 1 028 160 000 ds | 1 040 256 000 ds | 1 052 352 000 ds | 1 064 448 000 ds | 1 076 544 000 ds | 1 088 640 000 ds | 1 100 736 000 ds | 1 112 832 000 ds | 1 124 928 000 ds | 1 137 024 000 ds | 1 149 120 000 ds | 1 161 216 000 ds | 1 173 312 000 ds | 1 185 408 000 ds | 1 197 504 000 ds | 1 209 600 000 ds |
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 | deciseconds | fortnights | deciseconds |
|---|---|---|---|
| 1 | = 12096000 | 6 | = 72576000 |
| 2 | = 24192000 | 7 | = 84672000 |
| 3 | = 36288000 | 8 | = 96768000 |
| 4 | = 48384000 | 9 | = 108864000 |
| 5 | = 60480000 | 10 | = 120960000 |
Decisecond is equal to 10-1 second (unit of time), comes from a combination of the metric prefix deci (d) with the second (s). Plural name is deciseconds.
| Name of unit | Symbol | Definition | Relation to SI units | Unit System |
|---|---|---|---|---|
| decisecond | ds | ≡ 10-1 second | ≡ 0.1 second | Metric system SI |
| deciseconds | fortnights | deciseconds | fortnights |
|---|---|---|---|
| 1 | = 8.2671957671958E-8 | 6 | = 4.9603174603175E-7 |
| 2 | = 1.6534391534392E-7 | 7 | = 5.787037037037E-7 |
| 3 | = 2.4801587301587E-7 | 8 | = 6.6137566137566E-7 |
| 4 | = 3.3068783068783E-7 | 9 | = 7.4404761904762E-7 |
| 5 | = 4.1335978835979E-7 | 10 | = 8.2671957671958E-7 |
| fortnights | deciseconds |
|---|---|
| 1 | = 12 096 000 |
| 8.2671957671958 × 10-8 | = 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 …) |