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 |
rod | 0.3636364 rd | 0.7272727 rd | 1.0909091 rd | 1.4545455 rd | 1.8181818 rd | 2.1818182 rd | 2.5454545 rd | 2.9090909 rd | 3.2727273 rd | 3.6363636 rd | 4 rd | 4.3636364 rd | 4.7272727 rd | 5.0909091 rd | 5.4545455 rd | 5.8181818 rd | 6.1818182 rd | 6.5454545 rd | 6.9090909 rd | 7.2727273 rd | 7.6363636 rd | 8 rd | 8.3636364 rd | 8.7272727 rd | 9.0909091 rd | 9.4545455 rd | 9.8181818 rd | 10.1818182 rd | 10.5454545 rd | 10.9090909 rd | 11.2727273 rd | 11.6363636 rd | 12 rd | 12.3636364 rd | 12.7272727 rd | 13.0909091 rd | 13.4545455 rd | 13.8181818 rd | 14.1818182 rd | 14.5454545 rd | 14.9090909 rd | 15.2727273 rd | 15.6363636 rd | 16 rd | 16.3636364 rd | 16.7272727 rd | 17.0909091 rd | 17.4545455 rd | 17.8181818 rd | 18.1818182 rd | 18.5454545 rd | 18.9090909 rd | 19.2727273 rd | 19.6363636 rd | 20 rd | 20.3636364 rd | 20.7272727 rd | 21.0909091 rd | 21.4545455 rd | 21.8181818 rd | 22.1818182 rd | 22.5454545 rd | 22.9090909 rd | 23.2727273 rd | 23.6363636 rd | 24 rd | 24.3636364 rd | 24.7272727 rd | 25.0909091 rd | 25.4545455 rd | 25.8181818 rd | 26.1818182 rd | 26.5454545 rd | 26.9090909 rd | 27.2727273 rd | 27.6363636 rd | 28 rd | 28.3636364 rd | 28.7272727 rd | 29.0909091 rd | 29.4545455 rd | 29.8181818 rd | 30.1818182 rd | 30.5454545 rd | 30.9090909 rd | 31.2727273 rd | 31.6363636 rd | 32 rd | 32.3636364 rd | 32.7272727 rd | 33.0909091 rd | 33.4545455 rd | 33.8181818 rd | 34.1818182 rd | 34.5454545 rd | 34.9090909 rd | 35.2727273 rd | 35.6363636 rd | 36 rd | 36.3636364 rd |
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 | rods | fathoms | rods |
---|---|---|---|
1 | = 0.36363636363636 | 4 | = 1.4545454545455 |
1.5 | = 0.54545454545455 | 4.5 | = 1.6363636363636 |
2 | = 0.72727272727273 | 5 | = 1.8181818181818 |
2.5 | = 0.90909090909091 | 5.5 | = 2 |
3 | = 1.0909090909091 | 6 | = 2.1818181818182 |
The rod or perch or pole is a surveyors tool and unit of length equal to 5 1⁄2 yards, 16 1⁄2 feet, 1⁄320 of a statute mile or one-fourth of a surveyor's chain and 5.0292 meters.
Name of unit | Symbol | Definition | Relation to SI units | Unit System |
---|---|---|---|---|
rod | rd | ≡ 16 1⁄2 ft | = 5.0292 m | Imperial/US |
rods | fathoms | rods | fathoms |
---|---|---|---|
1 | = 2.75 | 4 | = 11 |
1.5 | = 4.125 | 4.5 | = 12.375 |
2 | = 5.5 | 5 | = 13.75 |
2.5 | = 6.875 | 5.5 | = 15.125 |
3 | = 8.25 | 6 | = 16.5 |
fathoms | rods |
---|---|
1 | = 0.3636364 |
2.75 | = 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 …) |