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 |
nail (cloth) | 0.0058326 nail (cloth) | 0.0116652 nail (cloth) | 0.0174978 nail (cloth) | 0.0233304 nail (cloth) | 0.0291630 nail (cloth) | 0.0349956 nail (cloth) | 0.0408282 nail (cloth) | 0.0466608 nail (cloth) | 0.0524934 nail (cloth) | 0.0583260 nail (cloth) | 0.0641586 nail (cloth) | 0.0699913 nail (cloth) | 0.0758239 nail (cloth) | 0.0816565 nail (cloth) | 0.0874891 nail (cloth) | 0.0933217 nail (cloth) | 0.0991543 nail (cloth) | 0.1049869 nail (cloth) | 0.1108195 nail (cloth) | 0.1166521 nail (cloth) | 0.1224847 nail (cloth) | 0.1283173 nail (cloth) | 0.1341499 nail (cloth) | 0.1399825 nail (cloth) | 0.1458151 nail (cloth) | 0.1516477 nail (cloth) | 0.1574803 nail (cloth) | 0.1633129 nail (cloth) | 0.1691455 nail (cloth) | 0.1749781 nail (cloth) | 0.1808107 nail (cloth) | 0.1866433 nail (cloth) | 0.1924759 nail (cloth) | 0.1983085 nail (cloth) | 0.2041411 nail (cloth) | 0.2099738 nail (cloth) | 0.2158064 nail (cloth) | 0.2216390 nail (cloth) | 0.2274716 nail (cloth) | 0.2333042 nail (cloth) | 0.2391368 nail (cloth) | 0.2449694 nail (cloth) | 0.2508020 nail (cloth) | 0.2566346 nail (cloth) | 0.2624672 nail (cloth) | 0.2682998 nail (cloth) | 0.2741324 nail (cloth) | 0.2799650 nail (cloth) | 0.2857976 nail (cloth) | 0.2916302 nail (cloth) | 0.2974628 nail (cloth) | 0.3032954 nail (cloth) | 0.3091280 nail (cloth) | 0.3149606 nail (cloth) | 0.3207932 nail (cloth) | 0.3266258 nail (cloth) | 0.3324584 nail (cloth) | 0.3382910 nail (cloth) | 0.3441237 nail (cloth) | 0.3499563 nail (cloth) | 0.3557889 nail (cloth) | 0.3616215 nail (cloth) | 0.3674541 nail (cloth) | 0.3732867 nail (cloth) | 0.3791193 nail (cloth) | 0.3849519 nail (cloth) | 0.3907845 nail (cloth) | 0.3966171 nail (cloth) | 0.4024497 nail (cloth) | 0.4082823 nail (cloth) | 0.4141149 nail (cloth) | 0.4199475 nail (cloth) | 0.4257801 nail (cloth) | 0.4316127 nail (cloth) | 0.4374453 nail (cloth) | 0.4432779 nail (cloth) | 0.4491105 nail (cloth) | 0.4549431 nail (cloth) | 0.4607757 nail (cloth) | 0.4666083 nail (cloth) | 0.4724409 nail (cloth) | 0.4782735 nail (cloth) | 0.4841062 nail (cloth) | 0.4899388 nail (cloth) | 0.4957714 nail (cloth) | 0.5016040 nail (cloth) | 0.5074366 nail (cloth) | 0.5132692 nail (cloth) | 0.5191018 nail (cloth) | 0.5249344 nail (cloth) | 0.5307670 nail (cloth) | 0.5365996 nail (cloth) | 0.5424322 nail (cloth) | 0.5482648 nail (cloth) | 0.5540974 nail (cloth) | 0.5599300 nail (cloth) | 0.5657626 nail (cloth) | 0.5715952 nail (cloth) | 0.5774278 nail (cloth) | 0.5832604 nail (cloth) |
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 | nails (cloth) | french; charriere | nails (cloth) |
---|---|---|---|
1 | = 0.0058326042578011 | 4 | = 0.023330417031204 |
1.5 | = 0.0087489063867017 | 4.5 | = 0.026246719160105 |
2 | = 0.011665208515602 | 5 | = 0.029163021289006 |
2.5 | = 0.014581510644503 | 5.5 | = 0.032079323417906 |
3 | = 0.017497812773403 | 6 | = 0.034995625546807 |
A nail, as a unit of cloth measurement, is generally a sixteenth of a yard or 2 1/4 inches (5.715 cm). The nail was apparently named after the practice of hammering brass nails into the counter at shops where cloth was sold.
Name of unit | Symbol | Definition | Relation to SI units | Unit System |
---|---|---|---|---|
nail (cloth) | ≡ 2 1⁄4 in | = 0.05715 m | Other (Length) |
nails (cloth) | french; charriere | nails (cloth) | french; charriere |
---|---|---|---|
1 | = 171.45 | 4 | = 685.8 |
1.5 | = 257.175 | 4.5 | = 771.525 |
2 | = 342.9 | 5 | = 857.25 |
2.5 | = 428.625 | 5.5 | = 942.975 |
3 | = 514.35 | 6 | = 1028.7 |
french; charriere | nails (cloth) |
---|---|
1 | = 0.0058326 |
171.45 | = 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 …) |