| 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 |
| hand | 0.0032808 hand | 0.0065617 hand | 0.0098425 hand | 0.0131234 hand | 0.0164042 hand | 0.0196850 hand | 0.0229659 hand | 0.0262467 hand | 0.0295276 hand | 0.0328084 hand | 0.0360892 hand | 0.0393701 hand | 0.0426509 hand | 0.0459318 hand | 0.0492126 hand | 0.0524934 hand | 0.0557743 hand | 0.0590551 hand | 0.0623360 hand | 0.0656168 hand | 0.0688976 hand | 0.0721785 hand | 0.0754593 hand | 0.0787402 hand | 0.0820210 hand | 0.0853018 hand | 0.0885827 hand | 0.0918635 hand | 0.0951444 hand | 0.0984252 hand | 0.1017060 hand | 0.1049869 hand | 0.1082677 hand | 0.1115486 hand | 0.1148294 hand | 0.1181102 hand | 0.1213911 hand | 0.1246719 hand | 0.1279528 hand | 0.1312336 hand | 0.1345144 hand | 0.1377953 hand | 0.1410761 hand | 0.1443570 hand | 0.1476378 hand | 0.1509186 hand | 0.1541995 hand | 0.1574803 hand | 0.1607612 hand | 0.1640420 hand | 0.1673228 hand | 0.1706037 hand | 0.1738845 hand | 0.1771654 hand | 0.1804462 hand | 0.1837270 hand | 0.1870079 hand | 0.1902887 hand | 0.1935696 hand | 0.1968504 hand | 0.2001312 hand | 0.2034121 hand | 0.2066929 hand | 0.2099738 hand | 0.2132546 hand | 0.2165354 hand | 0.2198163 hand | 0.2230971 hand | 0.2263780 hand | 0.2296588 hand | 0.2329396 hand | 0.2362205 hand | 0.2395013 hand | 0.2427822 hand | 0.2460630 hand | 0.2493438 hand | 0.2526247 hand | 0.2559055 hand | 0.2591864 hand | 0.2624672 hand | 0.2657480 hand | 0.2690289 hand | 0.2723097 hand | 0.2755906 hand | 0.2788714 hand | 0.2821522 hand | 0.2854331 hand | 0.2887139 hand | 0.2919948 hand | 0.2952756 hand | 0.2985564 hand | 0.3018373 hand | 0.3051181 hand | 0.3083990 hand | 0.3116798 hand | 0.3149606 hand | 0.3182415 hand | 0.3215223 hand | 0.3248031 hand | 0.3280840 hand |
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 | hands | french; charriere | hands |
|---|---|---|---|
| 1 | = 0.0032808398950131 | 4 | = 0.013123359580052 |
| 1.5 | = 0.0049212598425197 | 4.5 | = 0.014763779527559 |
| 2 | = 0.0065616797900262 | 5 | = 0.016404199475066 |
| 2.5 | = 0.0082020997375328 | 5.5 | = 0.018044619422572 |
| 3 | = 0.0098425196850394 | 6 | = 0.019685039370079 |
The hand is a non-SI unit of measurement of length standardized to 4 inches (101.6 mm). It is used to measure the height of horses in some English-speaking countries, including Australia, Canada, the Republic of Ireland, the United Kingdom and the United States.
| Name of unit | Symbol | Definition | Relation to SI units | Unit System |
|---|---|---|---|---|
| hand | ≡ 4 in | ≡ 0.1016 m | Metric system Non-SI |
| hands | french; charriere | hands | french; charriere |
|---|---|---|---|
| 1 | = 304.8 | 4 | = 1219.2 |
| 1.5 | = 457.2 | 4.5 | = 1371.6 |
| 2 | = 609.6 | 5 | = 1524 |
| 2.5 | = 762 | 5.5 | = 1676.4 |
| 3 | = 914.4 | 6 | = 1828.8 |
| french; charriere | hands |
|---|---|
| 1 | = 0.0032808 |
| 304.8 | = 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 …) |