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 |
foot, metric (short) | 0.0011111 smf | 0.0022222 smf | 0.0033333 smf | 0.0044444 smf | 0.0055556 smf | 0.0066667 smf | 0.0077778 smf | 0.0088889 smf | 0.01 smf | 0.0111111 smf | 0.0122222 smf | 0.0133333 smf | 0.0144444 smf | 0.0155556 smf | 0.0166667 smf | 0.0177778 smf | 0.0188889 smf | 0.02 smf | 0.0211111 smf | 0.0222222 smf | 0.0233333 smf | 0.0244444 smf | 0.0255556 smf | 0.0266667 smf | 0.0277778 smf | 0.0288889 smf | 0.03 smf | 0.0311111 smf | 0.0322222 smf | 0.0333333 smf | 0.0344444 smf | 0.0355556 smf | 0.0366667 smf | 0.0377778 smf | 0.0388889 smf | 0.04 smf | 0.0411111 smf | 0.0422222 smf | 0.0433333 smf | 0.0444444 smf | 0.0455556 smf | 0.0466667 smf | 0.0477778 smf | 0.0488889 smf | 0.05 smf | 0.0511111 smf | 0.0522222 smf | 0.0533333 smf | 0.0544444 smf | 0.0555556 smf | 0.0566667 smf | 0.0577778 smf | 0.0588889 smf | 0.06 smf | 0.0611111 smf | 0.0622222 smf | 0.0633333 smf | 0.0644444 smf | 0.0655556 smf | 0.0666667 smf | 0.0677778 smf | 0.0688889 smf | 0.07 smf | 0.0711111 smf | 0.0722222 smf | 0.0733333 smf | 0.0744444 smf | 0.0755556 smf | 0.0766667 smf | 0.0777778 smf | 0.0788889 smf | 0.08 smf | 0.0811111 smf | 0.0822222 smf | 0.0833333 smf | 0.0844444 smf | 0.0855556 smf | 0.0866667 smf | 0.0877778 smf | 0.0888889 smf | 0.09 smf | 0.0911111 smf | 0.0922222 smf | 0.0933333 smf | 0.0944444 smf | 0.0955556 smf | 0.0966667 smf | 0.0977778 smf | 0.0988889 smf | 0.1 smf | 0.1011111 smf | 0.1022222 smf | 0.1033333 smf | 0.1044444 smf | 0.1055556 smf | 0.1066667 smf | 0.1077778 smf | 0.1088889 smf | 0.11 smf | 0.1111111 smf |
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 | feet, metric (short) | french; charriere | feet, metric (short) |
---|---|---|---|
1 | = 0.0011111111111111 | 4 | = 0.0044444444444444 |
1.5 | = 0.0016666666666667 | 4.5 | = 0.005 |
2 | = 0.0022222222222222 | 5 | = 0.0055555555555556 |
2.5 | = 0.0027777777777778 | 5.5 | = 0.0061111111111111 |
3 | = 0.0033333333333333 | 6 | = 0.0066666666666667 |
≡ 0.30 m
Name of unit | Symbol | Definition | Relation to SI units | Unit System |
---|---|---|---|---|
foot, metric (short) | smf | ≡ 0.30 m | ≡ 0.30 m | Metric system SI |
feet, metric (short) | french; charriere | feet, metric (short) | french; charriere |
---|---|---|---|
1 | = 900 | 4 | = 3600 |
1.5 | = 1350 | 4.5 | = 4050 |
2 | = 1800 | 5 | = 4500 |
2.5 | = 2250 | 5.5 | = 4950 |
3 | = 2700 | 6 | = 5400 |
french; charriere | feet, metric (short) |
---|---|
1 | = 0.0011111 |
900 | = 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 …) |