| light-day | 1 ly | 2 ly | 3 ly | 4 ly | 5 ly | 6 ly | 7 ly | 8 ly | 9 ly | 10 ly | 11 ly | 12 ly | 13 ly | 14 ly | 15 ly | 16 ly | 17 ly | 18 ly | 19 ly | 20 ly | 21 ly | 22 ly | 23 ly | 24 ly | 25 ly | 26 ly | 27 ly | 28 ly | 29 ly | 30 ly | 31 ly | 32 ly | 33 ly | 34 ly | 35 ly | 36 ly | 37 ly | 38 ly | 39 ly | 40 ly | 41 ly | 42 ly | 43 ly | 44 ly | 45 ly | 46 ly | 47 ly | 48 ly | 49 ly | 50 ly | 51 ly | 52 ly | 53 ly | 54 ly | 55 ly | 56 ly | 57 ly | 58 ly | 59 ly | 60 ly | 61 ly | 62 ly | 63 ly | 64 ly | 65 ly | 66 ly | 67 ly | 68 ly | 69 ly | 70 ly | 71 ly | 72 ly | 73 ly | 74 ly | 75 ly | 76 ly | 77 ly | 78 ly | 79 ly | 80 ly | 81 ly | 82 ly | 83 ly | 84 ly | 85 ly | 86 ly | 87 ly | 88 ly | 89 ly | 90 ly | 91 ly | 92 ly | 93 ly | 94 ly | 95 ly | 96 ly | 97 ly | 98 ly | 99 ly | 100 ly |
| fathom | 14 163 423 212 598 ftm | 28 326 846 425 197 ftm | 42 490 269 637 795 ftm | 56 653 692 850 394 ftm | 70 817 116 062 992 ftm | 84 980 539 275 591 ftm | 99 143 962 488 189 ftm | 1.1330738570079 × 1014 ftm | 1.2747080891339 × 1014 ftm | 1.4163423212598 × 1014 ftm | 1.5579765533858 × 1014 ftm | 1.6996107855118 × 1014 ftm | 1.8412450176378 × 1014 ftm | 1.9828792497638 × 1014 ftm | 2.1245134818898 × 1014 ftm | 2.2661477140157 × 1014 ftm | 2.4077819461417 × 1014 ftm | 2.5494161782677 × 1014 ftm | 2.6910504103937 × 1014 ftm | 2.8326846425197 × 1014 ftm | 2.9743188746457 × 1014 ftm | 3.1159531067717 × 1014 ftm | 3.2575873388976 × 1014 ftm | 3.3992215710236 × 1014 ftm | 3.5408558031496 × 1014 ftm | 3.6824900352756 × 1014 ftm | 3.8241242674016 × 1014 ftm | 3.9657584995276 × 1014 ftm | 4.1073927316535 × 1014 ftm | 4.2490269637795 × 1014 ftm | 4.3906611959055 × 1014 ftm | 4.5322954280315 × 1014 ftm | 4.6739296601575 × 1014 ftm | 4.8155638922835 × 1014 ftm | 4.9571981244094 × 1014 ftm | 5.0988323565354 × 1014 ftm | 5.2404665886614 × 1014 ftm | 5.3821008207874 × 1014 ftm | 5.5237350529134 × 1014 ftm | 5.6653692850394 × 1014 ftm | 5.8070035171654 × 1014 ftm | 5.9486377492913 × 1014 ftm | 6.0902719814173 × 1014 ftm | 6.2319062135433 × 1014 ftm | 6.3735404456693 × 1014 ftm | 6.5151746777953 × 1014 ftm | 6.6568089099213 × 1014 ftm | 6.7984431420472 × 1014 ftm | 6.9400773741732 × 1014 ftm | 7.0817116062992 × 1014 ftm | 7.2233458384252 × 1014 ftm | 7.3649800705512 × 1014 ftm | 7.5066143026772 × 1014 ftm | 7.6482485348032 × 1014 ftm | 7.7898827669291 × 1014 ftm | 7.9315169990551 × 1014 ftm | 8.0731512311811 × 1014 ftm | 8.2147854633071 × 1014 ftm | 8.3564196954331 × 1014 ftm | 8.4980539275591 × 1014 ftm | 8.639688159685 × 1014 ftm | 8.781322391811 × 1014 ftm | 8.922956623937 × 1014 ftm | 9.064590856063 × 1014 ftm | 9.206225088189 × 1014 ftm | 9.347859320315 × 1014 ftm | 9.4894935524409 × 1014 ftm | 9.6311277845669 × 1014 ftm | 9.7727620166929 × 1014 ftm | 9.9143962488189 × 1014 ftm | 1.0056030480945 × 1015 ftm | 1.0197664713071 × 1015 ftm | 1.0339298945197 × 1015 ftm | 1.0480933177323 × 1015 ftm | 1.0622567409449 × 1015 ftm | 1.0764201641575 × 1015 ftm | 1.0905835873701 × 1015 ftm | 1.1047470105827 × 1015 ftm | 1.1189104337953 × 1015 ftm | 1.1330738570079 × 1015 ftm | 1.1472372802205 × 1015 ftm | 1.1614007034331 × 1015 ftm | 1.1755641266457 × 1015 ftm | 1.1897275498583 × 1015 ftm | 1.2038909730709 × 1015 ftm | 1.2180543962835 × 1015 ftm | 1.2322178194961 × 1015 ftm | 1.2463812427087 × 1015 ftm | 1.2605446659213 × 1015 ftm | 1.2747080891339 × 1015 ftm | 1.2888715123465 × 1015 ftm | 1.3030349355591 × 1015 ftm | 1.3171983587717 × 1015 ftm | 1.3313617819843 × 1015 ftm | 1.3455252051969 × 1015 ftm | 1.3596886284094 × 1015 ftm | 1.373852051622 × 1015 ftm | 1.3880154748346 × 1015 ftm | 1.4021788980472 × 1015 ftm | 1.4163423212598 × 1015 ftm |
The light-day is a unit of length useful in astronomy, telecommunications and relativistic physics. It is defined as the distance that light travels in free space in oneday, and is equal to exactly 2.59020683712×1013 metres.
| 1 light-days = 14163423212598 fathoms | 4 light-days = 56653692850394 fathoms |
| 1.5 light-days = 21245134818898 fathoms | 4.5 light-days = 63735404456693 fathoms |
| 2 light-days = 28326846425197 fathoms | 5 light-days = 70817116062992 fathoms |
| 2.5 light-days = 35408558031496 fathoms | 5.5 light-days = 77898827669291 fathoms |
| 3 light-days = 42490269637795 fathoms | 6 light-days = 84980539275591 fathoms |
A fathom is a unit of length in the imperial and the U.S. customary systems equal to 6 feet (1.8288 metres), used especially for measuring the depth of water.
There are two yards (6 feet) in an imperial fathom. Originally the span of a man's outstretched arms, the size of a fathom has varied slightly depending on whether it was defined as a thousandth of an (Admiralty) nautical mile or as a multiple of the imperial yard. Formerly, the term was used for any of several units of length varying around 5–5 1⁄2 feet.
| 1 fathoms = 7.0604400150276E-14 light-days | 4 fathoms = 2.824176006011E-13 light-days |
| 1.5 fathoms = 1.0590660022541E-13 light-days | 4.5 fathoms = 3.1771980067624E-13 light-days |
| 2 fathoms = 1.4120880030055E-13 light-days | 5 fathoms = 3.5302200075138E-13 light-days |
| 2.5 fathoms = 1.7651100037569E-13 light-days | 5.5 fathoms = 3.8832420082652E-13 light-days |
| 3 fathoms = 2.1181320045083E-13 light-days | 6 fathoms = 4.2362640090165E-13 light-days |
| 1 light-days = 14 163 423 212 598 fathoms |
| 1 fathoms = 7.0604400150276 × 10-14 light-days |