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 |
inch | 0.0131234 in | 0.0262467 in | 0.0393701 in | 0.0524934 in | 0.0656168 in | 0.0787402 in | 0.0918635 in | 0.1049869 in | 0.1181102 in | 0.1312336 in | 0.1443570 in | 0.1574803 in | 0.1706037 in | 0.1837270 in | 0.1968504 in | 0.2099738 in | 0.2230971 in | 0.2362205 in | 0.2493438 in | 0.2624672 in | 0.2755906 in | 0.2887139 in | 0.3018373 in | 0.3149606 in | 0.3280840 in | 0.3412073 in | 0.3543307 in | 0.3674541 in | 0.3805774 in | 0.3937008 in | 0.4068241 in | 0.4199475 in | 0.4330709 in | 0.4461942 in | 0.4593176 in | 0.4724409 in | 0.4855643 in | 0.4986877 in | 0.5118110 in | 0.5249344 in | 0.5380577 in | 0.5511811 in | 0.5643045 in | 0.5774278 in | 0.5905512 in | 0.6036745 in | 0.6167979 in | 0.6299213 in | 0.6430446 in | 0.6561680 in | 0.6692913 in | 0.6824147 in | 0.6955381 in | 0.7086614 in | 0.7217848 in | 0.7349081 in | 0.7480315 in | 0.7611549 in | 0.7742782 in | 0.7874016 in | 0.8005249 in | 0.8136483 in | 0.8267717 in | 0.8398950 in | 0.8530184 in | 0.8661417 in | 0.8792651 in | 0.8923885 in | 0.9055118 in | 0.9186352 in | 0.9317585 in | 0.9448819 in | 0.9580052 in | 0.9711286 in | 0.9842520 in | 0.9973753 in | 1.0104987 in | 1.0236220 in | 1.0367454 in | 1.0498688 in | 1.0629921 in | 1.0761155 in | 1.0892388 in | 1.1023622 in | 1.1154856 in | 1.1286089 in | 1.1417323 in | 1.1548556 in | 1.1679790 in | 1.1811024 in | 1.1942257 in | 1.2073491 in | 1.2204724 in | 1.2335958 in | 1.2467192 in | 1.2598425 in | 1.2729659 in | 1.2860892 in | 1.2992126 in | 1.3123360 in |
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 | inches | french; charriere | inches |
---|---|---|---|
1 | = 0.013123359580052 | 4 | = 0.05249343832021 |
1.5 | = 0.019685039370079 | 4.5 | = 0.059055118110236 |
2 | = 0.026246719160105 | 5 | = 0.065616797900262 |
2.5 | = 0.032808398950131 | 5.5 | = 0.072178477690289 |
3 | = 0.039370078740157 | 6 | = 0.078740157480315 |
The inch (abbreviation: in or ″) is a unit of length in the (British) imperial and United States customary systems of measurement now formally equal to 1⁄36 yard but usually understood as 1⁄12 of a foot. Derived from the Roman uncia ("twelfth"), inch is also sometimes used to translate related units in other measurement systems, usually understood as deriving from the width of the human thumb.
Name of unit | Symbol | Definition | Relation to SI units | Unit System |
---|---|---|---|---|
inch | in | ≡ 2.54 cm ≡ 1⁄36 yd ≡ 1⁄12 ft | ≡ 0.0254 m | Imperial/US |
inches | french; charriere | inches | french; charriere |
---|---|---|---|
1 | = 76.2 | 4 | = 304.8 |
1.5 | = 114.3 | 4.5 | = 342.9 |
2 | = 152.4 | 5 | = 381 |
2.5 | = 190.5 | 5.5 | = 419.1 |
3 | = 228.6 | 6 | = 457.2 |
french; charriere | inches |
---|---|
1 | = 0.0131234 |
76.2 | = 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 …) |