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 |
barleycorn | 0.0394011 barleycorn | 0.0788022 barleycorn | 0.1182033 barleycorn | 0.1576044 barleycorn | 0.1970055 barleycorn | 0.2364066 barleycorn | 0.2758077 barleycorn | 0.3152088 barleycorn | 0.3546099 barleycorn | 0.3940110 barleycorn | 0.4334121 barleycorn | 0.4728132 barleycorn | 0.5122143 barleycorn | 0.5516154 barleycorn | 0.5910165 barleycorn | 0.6304177 barleycorn | 0.6698188 barleycorn | 0.7092199 barleycorn | 0.7486210 barleycorn | 0.7880221 barleycorn | 0.8274232 barleycorn | 0.8668243 barleycorn | 0.9062254 barleycorn | 0.9456265 barleycorn | 0.9850276 barleycorn | 1.0244287 barleycorn | 1.0638298 barleycorn | 1.1032309 barleycorn | 1.1426320 barleycorn | 1.1820331 barleycorn | 1.2214342 barleycorn | 1.2608353 barleycorn | 1.3002364 barleycorn | 1.3396375 barleycorn | 1.3790386 barleycorn | 1.4184397 barleycorn | 1.4578408 barleycorn | 1.4972419 barleycorn | 1.5366430 barleycorn | 1.5760441 barleycorn | 1.6154452 barleycorn | 1.6548463 barleycorn | 1.6942474 barleycorn | 1.7336485 barleycorn | 1.7730496 barleycorn | 1.8124507 barleycorn | 1.8518519 barleycorn | 1.8912530 barleycorn | 1.9306541 barleycorn | 1.9700552 barleycorn | 2.0094563 barleycorn | 2.0488574 barleycorn | 2.0882585 barleycorn | 2.1276596 barleycorn | 2.1670607 barleycorn | 2.2064618 barleycorn | 2.2458629 barleycorn | 2.2852640 barleycorn | 2.3246651 barleycorn | 2.3640662 barleycorn | 2.4034673 barleycorn | 2.4428684 barleycorn | 2.4822695 barleycorn | 2.5216706 barleycorn | 2.5610717 barleycorn | 2.6004728 barleycorn | 2.6398739 barleycorn | 2.6792750 barleycorn | 2.7186761 barleycorn | 2.7580772 barleycorn | 2.7974783 barleycorn | 2.8368794 barleycorn | 2.8762805 barleycorn | 2.9156816 barleycorn | 2.9550827 barleycorn | 2.9944838 barleycorn | 3.0338849 barleycorn | 3.0732861 barleycorn | 3.1126872 barleycorn | 3.1520883 barleycorn | 3.1914894 barleycorn | 3.2308905 barleycorn | 3.2702916 barleycorn | 3.3096927 barleycorn | 3.3490938 barleycorn | 3.3884949 barleycorn | 3.4278960 barleycorn | 3.4672971 barleycorn | 3.5066982 barleycorn | 3.5460993 barleycorn | 3.5855004 barleycorn | 3.6249015 barleycorn | 3.6643026 barleycorn | 3.7037037 barleycorn | 3.7431048 barleycorn | 3.7825059 barleycorn | 3.8219070 barleycorn | 3.8613081 barleycorn | 3.9007092 barleycorn | 3.9401103 barleycorn |
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 | barleycorns | french; charriere | barleycorns |
---|---|---|---|
1 | ≈ 0.03940110323089 | 4 | ≈ 0.15760441292356 |
1.5 | ≈ 0.059101654846336 | 4.5 | ≈ 0.17730496453901 |
2 | ≈ 0.078802206461781 | 5 | ≈ 0.19700551615445 |
2.5 | ≈ 0.098502758077226 | 5.5 | ≈ 0.2167060677699 |
3 | ≈ 0.11820330969267 | 6 | ≈ 0.23640661938534 |
The barleycorn is a small English unit of length equal to 1⁄3 of an inch (i.e., close to 0.8467 cm) still used in Great Britain and Ireland as a determiner of shoe sizes.
Name of unit | Symbol | Definition | Relation to SI units | Unit System |
---|---|---|---|---|
barleycorn | = 1⁄3 in | ≈ 8.46×10−3 m | Imperial/US |
barleycorns | french; charriere | barleycorns | french; charriere |
---|---|---|---|
1 | ≈ 25.38 | 4 | ≈ 101.52 |
1.5 | ≈ 38.07 | 4.5 | ≈ 114.21 |
2 | ≈ 50.76 | 5 | ≈ 126.9 |
2.5 | ≈ 63.45 | 5.5 | ≈ 139.59 |
3 | ≈ 76.14 | 6 | ≈ 152.28 |
french; charriere | barleycorns |
---|---|
1 | ≈ 0.0394011 |
25.38 | ≈ 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 …) |