fathom | 1 ftm | 2 ftm | 3 ftm | 4 ftm | 5 ftm | 6 ftm | 7 ftm | 8 ftm | 9 ftm | 10 ftm | 11 ftm | 12 ftm | 13 ftm | 14 ftm | 15 ftm | 16 ftm | 17 ftm | 18 ftm | 19 ftm | 20 ftm | 21 ftm | 22 ftm | 23 ftm | 24 ftm | 25 ftm | 26 ftm | 27 ftm | 28 ftm | 29 ftm | 30 ftm | 31 ftm | 32 ftm | 33 ftm | 34 ftm | 35 ftm | 36 ftm | 37 ftm | 38 ftm | 39 ftm | 40 ftm | 41 ftm | 42 ftm | 43 ftm | 44 ftm | 45 ftm | 46 ftm | 47 ftm | 48 ftm | 49 ftm | 50 ftm | 51 ftm | 52 ftm | 53 ftm | 54 ftm | 55 ftm | 56 ftm | 57 ftm | 58 ftm | 59 ftm | 60 ftm | 61 ftm | 62 ftm | 63 ftm | 64 ftm | 65 ftm | 66 ftm | 67 ftm | 68 ftm | 69 ftm | 70 ftm | 71 ftm | 72 ftm | 73 ftm | 74 ftm | 75 ftm | 76 ftm | 77 ftm | 78 ftm | 79 ftm | 80 ftm | 81 ftm | 82 ftm | 83 ftm | 84 ftm | 85 ftm | 86 ftm | 87 ftm | 88 ftm | 89 ftm | 90 ftm | 91 ftm | 92 ftm | 93 ftm | 94 ftm | 95 ftm | 96 ftm | 97 ftm | 98 ftm | 99 ftm | 100 ftm |
light-day | 7.0604400150276 × 10-14 ly | 1.4120880030055 × 10-13 ly | 2.1181320045083 × 10-13 ly | 2.824176006011 × 10-13 ly | 3.5302200075138 × 10-13 ly | 4.2362640090165 × 10-13 ly | 4.9423080105193 × 10-13 ly | 5.648352012022 × 10-13 ly | 6.3543960135248 × 10-13 ly | 7.0604400150276 × 10-13 ly | 7.7664840165303 × 10-13 ly | 8.4725280180331 × 10-13 ly | 9.1785720195358 × 10-13 ly | 9.8846160210386 × 10-13 ly | 1.0590660022541 × 10-12 ly | 1.1296704024044 × 10-12 ly | 1.2002748025547 × 10-12 ly | 1.270879202705 × 10-12 ly | 1.3414836028552 × 10-12 ly | 1.4120880030055 × 10-12 ly | 1.4826924031558 × 10-12 ly | 1.5532968033061 × 10-12 ly | 1.6239012034563 × 10-12 ly | 1.6945056036066 × 10-12 ly | 1.7651100037569 × 10-12 ly | 1.8357144039072 × 10-12 ly | 1.9063188040574 × 10-12 ly | 1.9769232042077 × 10-12 ly | 2.047527604358 × 10-12 ly | 2.1181320045083 × 10-12 ly | 2.1887364046585 × 10-12 ly | 2.2593408048088 × 10-12 ly | 2.3299452049591 × 10-12 ly | 2.4005496051094 × 10-12 ly | 2.4711540052596 × 10-12 ly | 2.5417584054099 × 10-12 ly | 2.6123628055602 × 10-12 ly | 2.6829672057105 × 10-12 ly | 2.7535716058607 × 10-12 ly | 2.824176006011 × 10-12 ly | 2.8947804061613 × 10-12 ly | 2.9653848063116 × 10-12 ly | 3.0359892064618 × 10-12 ly | 3.1065936066121 × 10-12 ly | 3.1771980067624 × 10-12 ly | 3.2478024069127 × 10-12 ly | 3.3184068070629 × 10-12 ly | 3.3890112072132 × 10-12 ly | 3.4596156073635 × 10-12 ly | 3.5302200075138 × 10-12 ly | 3.6008244076641 × 10-12 ly | 3.6714288078143 × 10-12 ly | 3.7420332079646 × 10-12 ly | 3.8126376081149 × 10-12 ly | 3.8832420082652 × 10-12 ly | 3.9538464084154 × 10-12 ly | 4.0244508085657 × 10-12 ly | 4.095055208716 × 10-12 ly | 4.1656596088663 × 10-12 ly | 4.2362640090165 × 10-12 ly | 4.3068684091668 × 10-12 ly | 4.3774728093171 × 10-12 ly | 4.4480772094674 × 10-12 ly | 4.5186816096176 × 10-12 ly | 4.5892860097679 × 10-12 ly | 4.6598904099182 × 10-12 ly | 4.7304948100685 × 10-12 ly | 4.8010992102187 × 10-12 ly | 4.871703610369 × 10-12 ly | 4.9423080105193 × 10-12 ly | 5.0129124106696 × 10-12 ly | 5.0835168108198 × 10-12 ly | 5.1541212109701 × 10-12 ly | 5.2247256111204 × 10-12 ly | 5.2953300112707 × 10-12 ly | 5.3659344114209 × 10-12 ly | 5.4365388115712 × 10-12 ly | 5.5071432117215 × 10-12 ly | 5.5777476118718 × 10-12 ly | 5.648352012022 × 10-12 ly | 5.7189564121723 × 10-12 ly | 5.7895608123226 × 10-12 ly | 5.8601652124729 × 10-12 ly | 5.9307696126231 × 10-12 ly | 6.0013740127734 × 10-12 ly | 6.0719784129237 × 10-12 ly | 6.142582813074 × 10-12 ly | 6.2131872132242 × 10-12 ly | 6.2837916133745 × 10-12 ly | 6.3543960135248 × 10-12 ly | 6.4250004136751 × 10-12 ly | 6.4956048138253 × 10-12 ly | 6.5662092139756 × 10-12 ly | 6.6368136141259 × 10-12 ly | 6.7074180142762 × 10-12 ly | 6.7780224144264 × 10-12 ly | 6.8486268145767 × 10-12 ly | 6.919231214727 × 10-12 ly | 6.9898356148773 × 10-12 ly | 7.0604400150276 × 10-12 ly |
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.
Name of unit | Symbol | Definition | Relation to SI units | Unit System |
---|---|---|---|---|
fathom | ftm | ≡ 6 ft | = 1.8288 m | Imperial/US |
fathoms | light-days | fathoms | light-days |
---|---|---|---|
1 | = 7.0604400150276E-14 | 4 | = 2.824176006011E-13 |
1.5 | = 1.0590660022541E-13 | 4.5 | = 3.1771980067624E-13 |
2 | = 1.4120880030055E-13 | 5 | = 3.5302200075138E-13 |
2.5 | = 1.7651100037569E-13 | 5.5 | = 3.8832420082652E-13 |
3 | = 2.1181320045083E-13 | 6 | = 4.2362640090165E-13 |
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.
Name of unit | Symbol | Definition | Relation to SI units | Unit System |
---|---|---|---|---|
light-day | ly | ≡ 24 light-hours | ≡ 2.59020683712×1013 m | Science - Astronomy (Length) |
light-days | fathoms | light-days | fathoms |
---|---|---|---|
1 | = 14163423212598 | 4 | = 56653692850394 |
1.5 | = 21245134818898 | 4.5 | = 63735404456693 |
2 | = 28326846425197 | 5 | = 70817116062992 |
2.5 | = 35408558031496 | 5.5 | = 77898827669291 |
3 | = 42490269637795 | 6 | = 84980539275591 |
fathoms | light-days |
---|---|
1 | = 7.0604400150276 × 10-14 |
14 163 423 212 598 | = 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 …) |