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 |
twip | 18.8985902 twp | 37.7971803 twp | 56.6957705 twp | 75.5943607 twp | 94.4929508 twp | 113.3915410 twp | 132.2901312 twp | 151.1887213 twp | 170.0873115 twp | 188.9859017 twp | 207.8844918 twp | 226.7830820 twp | 245.6816721 twp | 264.5802623 twp | 283.4788525 twp | 302.3774426 twp | 321.2760328 twp | 340.1746230 twp | 359.0732131 twp | 377.9718033 twp | 396.8703935 twp | 415.7689836 twp | 434.6675738 twp | 453.5661640 twp | 472.4647541 twp | 491.3633443 twp | 510.2619345 twp | 529.1605246 twp | 548.0591148 twp | 566.9577050 twp | 585.8562951 twp | 604.7548853 twp | 623.6534755 twp | 642.5520656 twp | 661.4506558 twp | 680.3492459 twp | 699.2478361 twp | 718.1464263 twp | 737.0450164 twp | 755.9436066 twp | 774.8421968 twp | 793.7407869 twp | 812.6393771 twp | 831.5379673 twp | 850.4365574 twp | 869.3351476 twp | 888.2337378 twp | 907.1323279 twp | 926.0309181 twp | 944.9295083 twp | 963.8280984 twp | 982.7266886 twp | 1,001.6252788 twp | 1,020.5238689 twp | 1,039.4224591 twp | 1,058.3210492 twp | 1,077.2196394 twp | 1,096.1182296 twp | 1,115.0168197 twp | 1,133.9154099 twp | 1,152.8140001 twp | 1,171.7125902 twp | 1,190.6111804 twp | 1,209.5097706 twp | 1,228.4083607 twp | 1,247.3069509 twp | 1,266.2055411 twp | 1,285.1041312 twp | 1,304.0027214 twp | 1,322.9013116 twp | 1,341.7999017 twp | 1,360.6984919 twp | 1,379.5970821 twp | 1,398.4956722 twp | 1,417.3942624 twp | 1,436.2928526 twp | 1,455.1914427 twp | 1,474.0900329 twp | 1,492.9886230 twp | 1,511.8872132 twp | 1,530.7858034 twp | 1,549.6843935 twp | 1,568.5829837 twp | 1,587.4815739 twp | 1,606.3801640 twp | 1,625.2787542 twp | 1,644.1773444 twp | 1,663.0759345 twp | 1,681.9745247 twp | 1,700.8731149 twp | 1,719.7717050 twp | 1,738.6702952 twp | 1,757.5688854 twp | 1,776.4674755 twp | 1,795.3660657 twp | 1,814.2646559 twp | 1,833.1632460 twp | 1,852.0618362 twp | 1,870.9604264 twp | 1,889.8590165 twp |
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 | twips | french; charriere | twips |
---|---|---|---|
1 | = 18.898590165174 | 4 | = 75.594360660695 |
1.5 | = 28.347885247761 | 4.5 | = 85.043655743282 |
2 | = 37.797180330347 | 5 | = 94.492950825868 |
2.5 | = 47.246475412934 | 5.5 | = 103.94224590846 |
3 | = 56.695770495521 | 6 | = 113.39154099104 |
A twip (abbreviating "twentieth of a point", "twentieth of an inch point", or "twentieth of an Imperial point"[citation needed]) is a typographical measurement, defined as 1/20 of a typographical point. One twip is 1/1440 inch or 17.639 µm.
Name of unit | Symbol | Definition | Relation to SI units | Unit System |
---|---|---|---|---|
twip | twp | ≡ 1⁄1440 in | = 1.7638×10−5 m | Imperial/US |
twips | french; charriere | twips | french; charriere |
---|---|---|---|
1 | = 0.052914 | 4 | = 0.211656 |
1.5 | = 0.079371 | 4.5 | = 0.238113 |
2 | = 0.105828 | 5 | = 0.26457 |
2.5 | = 0.132285 | 5.5 | = 0.291027 |
3 | = 0.158742 | 6 | = 0.317484 |
french; charriere | twips |
---|---|
1 | = 18.8985902 |
0.052914 | = 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 …) |