french; charriere | 1 F | 2 F | 3 F | 4 F | 5 F | 6 F | 7 F | 8 F | 9 F | 10 F | 11 F | 12 F | 13 F | 14 F | 15 F | 16 F | 17 F | 18 F | 19 F | 20 F | 21 F | 22 F | 23 F | 24 F | 25 F | 26 F | 27 F | 28 F | 29 F | 30 F | 31 F | 32 F | 33 F | 34 F | 35 F | 36 F | 37 F | 38 F | 39 F | 40 F | 41 F | 42 F | 43 F | 44 F | 45 F | 46 F | 47 F | 48 F | 49 F | 50 F | 51 F | 52 F | 53 F | 54 F | 55 F | 56 F | 57 F | 58 F | 59 F | 60 F | 61 F | 62 F | 63 F | 64 F | 65 F | 66 F | 67 F | 68 F | 69 F | 70 F | 71 F | 72 F | 73 F | 74 F | 75 F | 76 F | 77 F | 78 F | 79 F | 80 F | 81 F | 82 F | 83 F | 84 F | 85 F | 86 F | 87 F | 88 F | 89 F | 90 F | 91 F | 92 F | 93 F | 94 F | 95 F | 96 F | 97 F | 98 F | 99 F | 100 F |
fathom | 0.0001823 ftm | 0.0003645 ftm | 0.0005468 ftm | 0.0007291 ftm | 0.0009113 ftm | 0.0010936 ftm | 0.0012759 ftm | 0.0014582 ftm | 0.0016404 ftm | 0.0018227 ftm | 0.0020050 ftm | 0.0021872 ftm | 0.0023695 ftm | 0.0025518 ftm | 0.0027340 ftm | 0.0029163 ftm | 0.0030986 ftm | 0.0032808 ftm | 0.0034631 ftm | 0.0036454 ftm | 0.0038276 ftm | 0.0040099 ftm | 0.0041922 ftm | 0.0043745 ftm | 0.0045567 ftm | 0.0047390 ftm | 0.0049213 ftm | 0.0051035 ftm | 0.0052858 ftm | 0.0054681 ftm | 0.0056503 ftm | 0.0058326 ftm | 0.0060149 ftm | 0.0061971 ftm | 0.0063794 ftm | 0.0065617 ftm | 0.0067439 ftm | 0.0069262 ftm | 0.0071085 ftm | 0.0072908 ftm | 0.0074730 ftm | 0.0076553 ftm | 0.0078376 ftm | 0.0080198 ftm | 0.0082021 ftm | 0.0083844 ftm | 0.0085666 ftm | 0.0087489 ftm | 0.0089312 ftm | 0.0091134 ftm | 0.0092957 ftm | 0.0094780 ftm | 0.0096603 ftm | 0.0098425 ftm | 0.0100248 ftm | 0.0102071 ftm | 0.0103893 ftm | 0.0105716 ftm | 0.0107539 ftm | 0.0109361 ftm | 0.0111184 ftm | 0.0113007 ftm | 0.0114829 ftm | 0.0116652 ftm | 0.0118475 ftm | 0.0120297 ftm | 0.0122120 ftm | 0.0123943 ftm | 0.0125766 ftm | 0.0127588 ftm | 0.0129411 ftm | 0.0131234 ftm | 0.0133056 ftm | 0.0134879 ftm | 0.0136702 ftm | 0.0138524 ftm | 0.0140347 ftm | 0.0142170 ftm | 0.0143992 ftm | 0.0145815 ftm | 0.0147638 ftm | 0.0149460 ftm | 0.0151283 ftm | 0.0153106 ftm | 0.0154929 ftm | 0.0156751 ftm | 0.0158574 ftm | 0.0160397 ftm | 0.0162219 ftm | 0.0164042 ftm | 0.0165865 ftm | 0.0167687 ftm | 0.0169510 ftm | 0.0171333 ftm | 0.0173155 ftm | 0.0174978 ftm | 0.0176801 ftm | 0.0178624 ftm | 0.0180446 ftm | 0.0182269 ftm |
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 |
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 |
french; charriere | fathoms |
---|---|
1 | = 0.0001823 |
5,486.4 | = 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 …) |