| 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).
| 1 french; charriere = 0.00018226888305628 fathoms | 4 french; charriere = 0.00072907553222514 fathoms |
| 1.5 french; charriere = 0.00027340332458443 fathoms | 4.5 french; charriere = 0.00082020997375328 fathoms |
| 2 french; charriere = 0.00036453776611257 fathoms | 5 french; charriere = 0.00091134441528142 fathoms |
| 2.5 french; charriere = 0.00045567220764071 fathoms | 5.5 french; charriere = 0.0010024788568096 fathoms |
| 3 french; charriere = 0.00054680664916885 fathoms | 6 french; charriere = 0.0010936132983377 fathoms |
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.
| 1 fathoms = 5486.4 french; charriere | 4 fathoms = 21945.6 french; charriere |
| 1.5 fathoms = 8229.6 french; charriere | 4.5 fathoms = 24688.8 french; charriere |
| 2 fathoms = 10972.8 french; charriere | 5 fathoms = 27432 french; charriere |
| 2.5 fathoms = 13716 french; charriere | 5.5 fathoms = 30175.2 french; charriere |
| 3 fathoms = 16459.2 french; charriere | 6 fathoms = 32918.4 french; charriere |
| 1 french; charriere = 0.0001823 fathoms |
| 1 fathoms = 5,486.4 french; charriere |