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 |
picometer | 333,333,333.33333 pm | 666,666,666.66667 pm | 1 000 000 000 pm | 1,333,333,333.3333 pm | 1,666,666,666.6667 pm | 2 000 000 000 pm | 2,333,333,333.3333 pm | 2,666,666,666.6667 pm | 3 000 000 000 pm | 3,333,333,333.3333 pm | 3,666,666,666.6667 pm | 4 000 000 000 pm | 4,333,333,333.3333 pm | 4,666,666,666.6667 pm | 5 000 000 000 pm | 5,333,333,333.3333 pm | 5,666,666,666.6667 pm | 6 000 000 000 pm | 6,333,333,333.3333 pm | 6,666,666,666.6667 pm | 7 000 000 000 pm | 7,333,333,333.3333 pm | 7,666,666,666.6667 pm | 8 000 000 000 pm | 8,333,333,333.3333 pm | 8,666,666,666.6667 pm | 9 000 000 000 pm | 9,333,333,333.3333 pm | 9,666,666,666.6667 pm | 10 000 000 000 pm | 10,333,333,333.333 pm | 10,666,666,666.667 pm | 11 000 000 000 pm | 11,333,333,333.333 pm | 11,666,666,666.667 pm | 12 000 000 000 pm | 12,333,333,333.333 pm | 12,666,666,666.667 pm | 13 000 000 000 pm | 13,333,333,333.333 pm | 13,666,666,666.667 pm | 14 000 000 000 pm | 14,333,333,333.333 pm | 14,666,666,666.667 pm | 15 000 000 000 pm | 15,333,333,333.333 pm | 15,666,666,666.667 pm | 16 000 000 000 pm | 16,333,333,333.333 pm | 16,666,666,666.667 pm | 17 000 000 000 pm | 17,333,333,333.333 pm | 17,666,666,666.667 pm | 18 000 000 000 pm | 18,333,333,333.333 pm | 18,666,666,666.667 pm | 19 000 000 000 pm | 19,333,333,333.333 pm | 19,666,666,666.667 pm | 20 000 000 000 pm | 20,333,333,333.333 pm | 20,666,666,666.667 pm | 21 000 000 000 pm | 21,333,333,333.333 pm | 21,666,666,666.667 pm | 22 000 000 000 pm | 22,333,333,333.333 pm | 22,666,666,666.667 pm | 23 000 000 000 pm | 23,333,333,333.333 pm | 23,666,666,666.667 pm | 24 000 000 000 pm | 24,333,333,333.333 pm | 24,666,666,666.667 pm | 25 000 000 000 pm | 25,333,333,333.333 pm | 25,666,666,666.667 pm | 26 000 000 000 pm | 26,333,333,333.333 pm | 26,666,666,666.667 pm | 27 000 000 000 pm | 27,333,333,333.333 pm | 27,666,666,666.667 pm | 28 000 000 000 pm | 28,333,333,333.333 pm | 28,666,666,666.667 pm | 29 000 000 000 pm | 29,333,333,333.333 pm | 29,666,666,666.667 pm | 30 000 000 000 pm | 30,333,333,333.333 pm | 30,666,666,666.667 pm | 31 000 000 000 pm | 31,333,333,333.333 pm | 31,666,666,666.667 pm | 32 000 000 000 pm | 32,333,333,333.333 pm | 32,666,666,666.667 pm | 33 000 000 000 pm | 33,333,333,333.333 pm |
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 | picometers | french; charriere | picometers |
---|---|---|---|
1 | = 333333333.33333 | 4 | = 1333333333.3333 |
1.5 | = 500000000 | 4.5 | = 1500000000 |
2 | = 666666666.66667 | 5 | = 1666666666.6667 |
2.5 | = 833333333.33333 | 5.5 | = 1833333333.3333 |
3 | = 1000000000 | 6 | = 2000000000 |
The picometre (International spelling as used by the International Bureau of Weights and Measures; SI symbol: pm) or picometer (American spelling) is a unit of length in the metric system, equal to 1×10−12 m, or one trillionth ( 1 / 1000000000000 ) of a metre, which is the SI base unit of length.
Name of unit | Symbol | Definition | Relation to SI units | Unit System |
---|---|---|---|---|
picometer | pm | ≡ 1×10-12 m | ≡ 1×10-12 m | Metric system SI |
picometers | french; charriere | picometers | french; charriere |
---|---|---|---|
1 | = 3.0E-9 | 4 | = 1.2E-8 |
1.5 | = 4.5E-9 | 4.5 | = 1.35E-8 |
2 | = 6.0E-9 | 5 | = 1.5E-8 |
2.5 | = 7.5E-9 | 5.5 | = 1.65E-8 |
3 | = 9.0E-9 | 6 | = 1.8E-8 |
french; charriere | picometers |
---|---|
1 | = 333,333,333.33333 |
3.0 × 10-9 | = 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 …) |