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 |
thou | 13.1233596 th | 26.2467192 th | 39.3700787 th | 52.4934383 th | 65.6167979 th | 78.7401575 th | 91.8635171 th | 104.9868766 th | 118.1102362 th | 131.2335958 th | 144.3569554 th | 157.4803150 th | 170.6036745 th | 183.7270341 th | 196.8503937 th | 209.9737533 th | 223.0971129 th | 236.2204724 th | 249.3438320 th | 262.4671916 th | 275.5905512 th | 288.7139108 th | 301.8372703 th | 314.9606299 th | 328.0839895 th | 341.2073491 th | 354.3307087 th | 367.4540682 th | 380.5774278 th | 393.7007874 th | 406.8241470 th | 419.9475066 th | 433.0708661 th | 446.1942257 th | 459.3175853 th | 472.4409449 th | 485.5643045 th | 498.6876640 th | 511.8110236 th | 524.9343832 th | 538.0577428 th | 551.1811024 th | 564.3044619 th | 577.4278215 th | 590.5511811 th | 603.6745407 th | 616.7979003 th | 629.9212598 th | 643.0446194 th | 656.1679790 th | 669.2913386 th | 682.4146982 th | 695.5380577 th | 708.6614173 th | 721.7847769 th | 734.9081365 th | 748.0314961 th | 761.1548556 th | 774.2782152 th | 787.4015748 th | 800.5249344 th | 813.6482940 th | 826.7716535 th | 839.8950131 th | 853.0183727 th | 866.1417323 th | 879.2650919 th | 892.3884514 th | 905.5118110 th | 918.6351706 th | 931.7585302 th | 944.8818898 th | 958.0052493 th | 971.1286089 th | 984.2519685 th | 997.3753281 th | 1,010.4986877 th | 1,023.6220472 th | 1,036.7454068 th | 1,049.8687664 th | 1,062.9921260 th | 1,076.1154856 th | 1,089.2388451 th | 1,102.3622047 th | 1,115.4855643 th | 1,128.6089239 th | 1,141.7322835 th | 1,154.8556430 th | 1,167.9790026 th | 1,181.1023622 th | 1,194.2257218 th | 1,207.3490814 th | 1,220.4724409 th | 1,233.5958005 th | 1,246.7191601 th | 1,259.8425197 th | 1,272.9658793 th | 1,286.0892388 th | 1,299.2125984 th | 1,312.3359580 th |
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 | thous | french; charriere | thous |
---|---|---|---|
1 | = 13.123359580052 | 4 | = 52.49343832021 |
1.5 | = 19.685039370079 | 4.5 | = 59.055118110236 |
2 | = 26.246719160105 | 5 | = 65.616797900262 |
2.5 | = 32.808398950131 | 5.5 | = 72.178477690289 |
3 | = 39.370078740157 | 6 | = 78.740157480315 |
A thousandth of an inch is a derived unit of length in an inch-based system of units. Equal to 0.001 inches, it is normally referred to as a thou /ˈθaʊ/, a thousandth, or (particularly in the United States) a mil.
Name of unit | Symbol | Definition | Relation to SI units | Unit System |
---|---|---|---|---|
thou | th | ≡ 1×10−3 in | ≡ 2.54×10−5 m | Imperial/US |
thous | french; charriere | thous | french; charriere |
---|---|---|---|
1 | = 0.0762 | 4 | = 0.3048 |
1.5 | = 0.1143 | 4.5 | = 0.3429 |
2 | = 0.1524 | 5 | = 0.381 |
2.5 | = 0.1905 | 5.5 | = 0.4191 |
3 | = 0.2286 | 6 | = 0.4572 |
french; charriere | thous |
---|---|
1 | = 13.1233596 |
0.0762 | = 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 …) |