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 |
french; charriere | 5,486.4 F | 10,972.8 F | 16,459.2 F | 21,945.6 F | 27 432 F | 32,918.4 F | 38,404.8 F | 43,891.2 F | 49,377.6 F | 54 864 F | 60,350.4 F | 65,836.8 F | 71,323.2 F | 76,809.6 F | 82 296 F | 87,782.4 F | 93,268.8 F | 98,755.2 F | 104,241.6 F | 109 728 F | 115,214.4 F | 120,700.8 F | 126,187.2 F | 131,673.6 F | 137 160 F | 142,646.4 F | 148,132.8 F | 153,619.2 F | 159,105.6 F | 164 592 F | 170,078.4 F | 175,564.8 F | 181,051.2 F | 186,537.6 F | 192 024 F | 197,510.4 F | 202,996.8 F | 208,483.2 F | 213,969.6 F | 219 456 F | 224,942.4 F | 230,428.8 F | 235,915.2 F | 241,401.6 F | 246 888 F | 252,374.4 F | 257,860.8 F | 263,347.2 F | 268,833.6 F | 274 320 F | 279,806.4 F | 285,292.8 F | 290,779.2 F | 296,265.6 F | 301 752 F | 307,238.4 F | 312,724.8 F | 318,211.2 F | 323,697.6 F | 329 184 F | 334,670.4 F | 340,156.8 F | 345,643.2 F | 351,129.6 F | 356 616 F | 362,102.4 F | 367,588.8 F | 373,075.2 F | 378,561.6 F | 384 048 F | 389,534.4 F | 395,020.8 F | 400,507.2 F | 405,993.6 F | 411 480 F | 416,966.4 F | 422,452.8 F | 427,939.2 F | 433,425.6 F | 438 912 F | 444,398.4 F | 449,884.8 F | 455,371.2 F | 460,857.6 F | 466 344 F | 471,830.4 F | 477,316.8 F | 482,803.2 F | 488,289.6 F | 493 776 F | 499,262.4 F | 504,748.8 F | 510,235.2 F | 515,721.6 F | 521 208 F | 526,694.4 F | 532,180.8 F | 537,667.2 F | 543,153.6 F | 548 640 F |
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 | french; charriere | fathoms | french; charriere |
---|---|---|---|
1 | = 5486.4 | 4 | = 21945.6 |
1.5 | = 8229.6 | 4.5 | = 24688.8 |
2 | = 10972.8 | 5 | = 27432 |
2.5 | = 13716 | 5.5 | = 30175.2 |
3 | = 16459.2 | 6 | = 32918.4 |
The French scale or French gauge system is commonly used to measure the size of a catheter. It is most often abbreviated as Fr, but can often be seen abbreviated as Fg, Ga, FR or F. It may also be abbreviated as CH or Ch (for Charrière, its inventor).
Name of unit | Symbol | Definition | Relation to SI units | Unit System |
---|---|---|---|---|
french; charriere | F | ≡ 1⁄3 mm | = 0.3×10−3 m | Other (Length) |
french; charriere | fathoms | french; charriere | fathoms |
---|---|---|---|
1 | = 0.00018226888305628 | 4 | = 0.00072907553222514 |
1.5 | = 0.00027340332458443 | 4.5 | = 0.00082020997375328 |
2 | = 0.00036453776611257 | 5 | = 0.00091134441528142 |
2.5 | = 0.00045567220764071 | 5.5 | = 0.0010024788568096 |
3 | = 0.00054680664916885 | 6 | = 0.0010936132983377 |
fathoms | french; charriere |
---|---|
1 | = 5,486.4 |
0.0001823 | = 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 …) |