| link | 1 lnk | 2 lnk | 3 lnk | 4 lnk | 5 lnk | 6 lnk | 7 lnk | 8 lnk | 9 lnk | 10 lnk | 11 lnk | 12 lnk | 13 lnk | 14 lnk | 15 lnk | 16 lnk | 17 lnk | 18 lnk | 19 lnk | 20 lnk | 21 lnk | 22 lnk | 23 lnk | 24 lnk | 25 lnk | 26 lnk | 27 lnk | 28 lnk | 29 lnk | 30 lnk | 31 lnk | 32 lnk | 33 lnk | 34 lnk | 35 lnk | 36 lnk | 37 lnk | 38 lnk | 39 lnk | 40 lnk | 41 lnk | 42 lnk | 43 lnk | 44 lnk | 45 lnk | 46 lnk | 47 lnk | 48 lnk | 49 lnk | 50 lnk | 51 lnk | 52 lnk | 53 lnk | 54 lnk | 55 lnk | 56 lnk | 57 lnk | 58 lnk | 59 lnk | 60 lnk | 61 lnk | 62 lnk | 63 lnk | 64 lnk | 65 lnk | 66 lnk | 67 lnk | 68 lnk | 69 lnk | 70 lnk | 71 lnk | 72 lnk | 73 lnk | 74 lnk | 75 lnk | 76 lnk | 77 lnk | 78 lnk | 79 lnk | 80 lnk | 81 lnk | 82 lnk | 83 lnk | 84 lnk | 85 lnk | 86 lnk | 87 lnk | 88 lnk | 89 lnk | 90 lnk | 91 lnk | 92 lnk | 93 lnk | 94 lnk | 95 lnk | 96 lnk | 97 lnk | 98 lnk | 99 lnk | 100 lnk |
| french; charriere | 603.5052 F | 1,207.0104 F | 1,810.5156 F | 2,414.0208 F | 3,017.526 F | 3,621.0312 F | 4,224.5364 F | 4,828.0416 F | 5,431.5468 F | 6,035.052 F | 6,638.5572 F | 7,242.0624 F | 7,845.5676 F | 8,449.0728 F | 9,052.578 F | 9,656.0832 F | 10,259.5884 F | 10,863.0936 F | 11,466.5988 F | 12,070.104 F | 12,673.6092 F | 13,277.1144 F | 13,880.6196 F | 14,484.1248 F | 15,087.63 F | 15,691.1352 F | 16,294.6404 F | 16,898.1456 F | 17,501.6508 F | 18,105.156 F | 18,708.6612 F | 19,312.1664 F | 19,915.6716 F | 20,519.1768 F | 21,122.682 F | 21,726.1872 F | 22,329.6924 F | 22,933.1976 F | 23,536.7028 F | 24,140.208 F | 24,743.7132 F | 25,347.2184 F | 25,950.7236 F | 26,554.2288 F | 27,157.734 F | 27,761.2392 F | 28,364.7444 F | 28,968.2496 F | 29,571.7548 F | 30,175.26 F | 30,778.7652 F | 31,382.2704 F | 31,985.7756 F | 32,589.2808 F | 33,192.786 F | 33,796.2912 F | 34,399.7964 F | 35,003.3016 F | 35,606.8068 F | 36,210.312 F | 36,813.8172 F | 37,417.3224 F | 38,020.8276 F | 38,624.3328 F | 39,227.838 F | 39,831.3432 F | 40,434.8484 F | 41,038.3536 F | 41,641.8588 F | 42,245.364 F | 42,848.8692 F | 43,452.3744 F | 44,055.8796 F | 44,659.3848 F | 45,262.89 F | 45,866.3952 F | 46,469.9004 F | 47,073.4056 F | 47,676.9108 F | 48,280.416 F | 48,883.9212 F | 49,487.4264 F | 50,090.9316 F | 50,694.4368 F | 51,297.942 F | 51,901.4472 F | 52,504.9524 F | 53,108.4576 F | 53,711.9628 F | 54,315.468 F | 54,918.9732 F | 55,522.4784 F | 56,125.9836 F | 56,729.4888 F | 57,332.994 F | 57,936.4992 F | 58,540.0044 F | 59,143.5096 F | 59,747.0148 F | 60,350.52 F |
The link (usually abbreviated as "l.", "li." or "lnk."), sometimes called a Gunter’s link, is a unit of length formerly used in many English-speaking countries. A link is exactly 66⁄100 of a foot, or exactly 7.92 inches or 20.1168 cm.
| Name of unit | Symbol | Definition | Relation to SI units | Unit System |
|---|---|---|---|---|
| link | lnk | ≡ 1⁄100 ch ≡ 0.66 ft (US) ≡ 7.92 in | ≈ 0.2011684 m | Imperial/US |
| links | french; charriere | links | french; charriere |
|---|---|---|---|
| 1 | ≈ 603.5052 | 4 | ≈ 2414.0208 |
| 1.5 | ≈ 905.2578 | 4.5 | ≈ 2715.7734 |
| 2 | ≈ 1207.0104 | 5 | ≈ 3017.526 |
| 2.5 | ≈ 1508.763 | 5.5 | ≈ 3319.2786 |
| 3 | ≈ 1810.5156 | 6 | ≈ 3621.0312 |
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 | links | french; charriere | links |
|---|---|---|---|
| 1 | ≈ 0.0016569865512344 | 4 | ≈ 0.0066279462049374 |
| 1.5 | ≈ 0.0024854798268515 | 4.5 | ≈ 0.0074564394805546 |
| 2 | ≈ 0.0033139731024687 | 5 | ≈ 0.0082849327561718 |
| 2.5 | ≈ 0.0041424663780859 | 5.5 | ≈ 0.009113426031789 |
| 3 | ≈ 0.0049709596537031 | 6 | ≈ 0.0099419193074061 |
| links | french; charriere |
|---|---|
| 1 | ≈ 603.5052 |
| 0.0016570 | ≈ 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 …) |