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 |
ell | 1.6 ell | 3.2 ell | 4.8 ell | 6.4 ell | 8 ell | 9.6 ell | 11.2 ell | 12.8 ell | 14.4 ell | 16 ell | 17.6 ell | 19.2 ell | 20.8 ell | 22.4 ell | 24 ell | 25.6 ell | 27.2 ell | 28.8 ell | 30.4 ell | 32 ell | 33.6 ell | 35.2 ell | 36.8 ell | 38.4 ell | 40 ell | 41.6 ell | 43.2 ell | 44.8 ell | 46.4 ell | 48 ell | 49.6 ell | 51.2 ell | 52.8 ell | 54.4 ell | 56 ell | 57.6 ell | 59.2 ell | 60.8 ell | 62.4 ell | 64 ell | 65.6 ell | 67.2 ell | 68.8 ell | 70.4 ell | 72 ell | 73.6 ell | 75.2 ell | 76.8 ell | 78.4 ell | 80 ell | 81.6 ell | 83.2 ell | 84.8 ell | 86.4 ell | 88 ell | 89.6 ell | 91.2 ell | 92.8 ell | 94.4 ell | 96 ell | 97.6 ell | 99.2 ell | 100.8 ell | 102.4 ell | 104 ell | 105.6 ell | 107.2 ell | 108.8 ell | 110.4 ell | 112 ell | 113.6 ell | 115.2 ell | 116.8 ell | 118.4 ell | 120 ell | 121.6 ell | 123.2 ell | 124.8 ell | 126.4 ell | 128 ell | 129.6 ell | 131.2 ell | 132.8 ell | 134.4 ell | 136 ell | 137.6 ell | 139.2 ell | 140.8 ell | 142.4 ell | 144 ell | 145.6 ell | 147.2 ell | 148.8 ell | 150.4 ell | 152 ell | 153.6 ell | 155.2 ell | 156.8 ell | 158.4 ell | 160 ell |
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 | ell | fathoms | ell |
---|---|---|---|
1 | = 1.6 | 4 | = 6.4 |
1.5 | = 2.4 | 4.5 | = 7.2 |
2 | = 3.2 | 5 | = 8 |
2.5 | = 4 | 5.5 | = 8.8 |
3 | = 4.8 | 6 | = 9.6 |
An ell (from Proto-Germanic *alinō, cognate with Latin ulna) is a unit of measurement, originally a cubit, i.e., approximating the length of a man's arm from the elbow ("elbow" means the bend or bow of the ell or arm) to the tip of the middle finger, or about 18 inches (457 mm); in later usage, any of several longer units.
Name of unit | Symbol | Definition | Relation to SI units | Unit System |
---|---|---|---|---|
ell | ell | ≡ 45 in (In England usually) | = 1.143 m | Other (Length) |
ell | fathoms | ell | fathoms |
---|---|---|---|
1 | = 0.625 | 4 | = 2.5 |
1.5 | = 0.9375 | 4.5 | = 2.8125 |
2 | = 1.25 | 5 | = 3.125 |
2.5 | = 1.5625 | 5.5 | = 3.4375 |
3 | = 1.875 | 6 | = 3.75 |
fathoms | ell |
---|---|
1 | = 1.6 |
0.625 | = 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 …) |