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 |
finger | 0.0149981 finger (US) | 0.0299963 finger (US) | 0.0449944 finger (US) | 0.0599925 finger (US) | 0.0749906 finger (US) | 0.0899888 finger (US) | 0.1049869 finger (US) | 0.1199850 finger (US) | 0.1349831 finger (US) | 0.1499813 finger (US) | 0.1649794 finger (US) | 0.1799775 finger (US) | 0.1949756 finger (US) | 0.2099738 finger (US) | 0.2249719 finger (US) | 0.2399700 finger (US) | 0.2549681 finger (US) | 0.2699663 finger (US) | 0.2849644 finger (US) | 0.2999625 finger (US) | 0.3149606 finger (US) | 0.3299588 finger (US) | 0.3449569 finger (US) | 0.3599550 finger (US) | 0.3749531 finger (US) | 0.3899513 finger (US) | 0.4049494 finger (US) | 0.4199475 finger (US) | 0.4349456 finger (US) | 0.4499438 finger (US) | 0.4649419 finger (US) | 0.4799400 finger (US) | 0.4949381 finger (US) | 0.5099363 finger (US) | 0.5249344 finger (US) | 0.5399325 finger (US) | 0.5549306 finger (US) | 0.5699288 finger (US) | 0.5849269 finger (US) | 0.5999250 finger (US) | 0.6149231 finger (US) | 0.6299213 finger (US) | 0.6449194 finger (US) | 0.6599175 finger (US) | 0.6749156 finger (US) | 0.6899138 finger (US) | 0.7049119 finger (US) | 0.7199100 finger (US) | 0.7349081 finger (US) | 0.7499063 finger (US) | 0.7649044 finger (US) | 0.7799025 finger (US) | 0.7949006 finger (US) | 0.8098988 finger (US) | 0.8248969 finger (US) | 0.8398950 finger (US) | 0.8548931 finger (US) | 0.8698913 finger (US) | 0.8848894 finger (US) | 0.8998875 finger (US) | 0.9148856 finger (US) | 0.9298838 finger (US) | 0.9448819 finger (US) | 0.9598800 finger (US) | 0.9748781 finger (US) | 0.9898763 finger (US) | 1.0048744 finger (US) | 1.0198725 finger (US) | 1.0348706 finger (US) | 1.0498688 finger (US) | 1.0648669 finger (US) | 1.0798650 finger (US) | 1.0948631 finger (US) | 1.1098613 finger (US) | 1.1248594 finger (US) | 1.1398575 finger (US) | 1.1548556 finger (US) | 1.1698538 finger (US) | 1.1848519 finger (US) | 1.1998500 finger (US) | 1.2148481 finger (US) | 1.2298463 finger (US) | 1.2448444 finger (US) | 1.2598425 finger (US) | 1.2748406 finger (US) | 1.2898388 finger (US) | 1.3048369 finger (US) | 1.3198350 finger (US) | 1.3348331 finger (US) | 1.3498313 finger (US) | 1.3648294 finger (US) | 1.3798275 finger (US) | 1.3948256 finger (US) | 1.4098238 finger (US) | 1.4248219 finger (US) | 1.4398200 finger (US) | 1.4548181 finger (US) | 1.4698163 finger (US) | 1.4848144 finger (US) | 1.4998125 finger (US) |
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 | finger | french; charriere | finger |
---|---|---|---|
1 | = 0.014998125234346 | 4 | = 0.059992500937383 |
1.5 | = 0.022497187851519 | 4.5 | = 0.067491563554556 |
2 | = 0.029996250468691 | 5 | = 0.074990626171729 |
2.5 | = 0.037495313085864 | 5.5 | = 0.082489688788901 |
3 | = 0.044994375703037 | 6 | = 0.089988751406074 |
A finger (sometimes fingerbreadth or finger's breadth) is any of several units of measurement that are approximately the width of an adult human finger, including:
The digit, also known as digitus or digitus transversus (Latin), dactyl (Greek) or dactylus, or finger's breadth — 3⁄4 of an inch or 1⁄16 of a foot.
Name of unit | Symbol | Definition | Relation to SI units | Unit System |
---|---|---|---|---|
finger | finger (US) | ≡ 7⁄8 in | = 0.022225 m | Imperial/US |
finger | french; charriere | finger | french; charriere |
---|---|---|---|
1 | = 66.675 | 4 | = 266.7 |
1.5 | = 100.0125 | 4.5 | = 300.0375 |
2 | = 133.35 | 5 | = 333.375 |
2.5 | = 166.6875 | 5.5 | = 366.7125 |
3 | = 200.025 | 6 | = 400.05 |
french; charriere | finger |
---|---|
1 | = 0.0149981 |
66.675 | = 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 …) |