| 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 |
| fermi | 333,333,333,333.33 fm | 666,666,666,666.67 fm | 1 000 000 000 000 fm | 1,333,333,333,333.3 fm | 1,666,666,666,666.7 fm | 2 000 000 000 000 fm | 2,333,333,333,333.3 fm | 2,666,666,666,666.7 fm | 3 000 000 000 000 fm | 3,333,333,333,333.3 fm | 3,666,666,666,666.7 fm | 4 000 000 000 000 fm | 4,333,333,333,333.3 fm | 4,666,666,666,666.7 fm | 5 000 000 000 000 fm | 5,333,333,333,333.3 fm | 5,666,666,666,666.7 fm | 6 000 000 000 000 fm | 6,333,333,333,333.3 fm | 6,666,666,666,666.7 fm | 7 000 000 000 000 fm | 7,333,333,333,333.3 fm | 7,666,666,666,666.7 fm | 8 000 000 000 000 fm | 8,333,333,333,333.3 fm | 8,666,666,666,666.7 fm | 9 000 000 000 000 fm | 9,333,333,333,333.3 fm | 9,666,666,666,666.7 fm | 10 000 000 000 000 fm | 10 333 333 333 333 fm | 10 666 666 666 667 fm | 11 000 000 000 000 fm | 11 333 333 333 333 fm | 11 666 666 666 667 fm | 12 000 000 000 000 fm | 12 333 333 333 333 fm | 12 666 666 666 667 fm | 13 000 000 000 000 fm | 13 333 333 333 333 fm | 13 666 666 666 667 fm | 14 000 000 000 000 fm | 14 333 333 333 333 fm | 14 666 666 666 667 fm | 15 000 000 000 000 fm | 15 333 333 333 333 fm | 15 666 666 666 667 fm | 16 000 000 000 000 fm | 16 333 333 333 333 fm | 16 666 666 666 667 fm | 17 000 000 000 000 fm | 17 333 333 333 333 fm | 17 666 666 666 667 fm | 18 000 000 000 000 fm | 18 333 333 333 333 fm | 18 666 666 666 667 fm | 19 000 000 000 000 fm | 19 333 333 333 333 fm | 19 666 666 666 667 fm | 20 000 000 000 000 fm | 20 333 333 333 333 fm | 20 666 666 666 667 fm | 21 000 000 000 000 fm | 21 333 333 333 333 fm | 21 666 666 666 667 fm | 22 000 000 000 000 fm | 22 333 333 333 333 fm | 22 666 666 666 667 fm | 23 000 000 000 000 fm | 23 333 333 333 333 fm | 23 666 666 666 667 fm | 24 000 000 000 000 fm | 24 333 333 333 333 fm | 24 666 666 666 667 fm | 25 000 000 000 000 fm | 25 333 333 333 333 fm | 25 666 666 666 667 fm | 26 000 000 000 000 fm | 26 333 333 333 333 fm | 26 666 666 666 667 fm | 27 000 000 000 000 fm | 27 333 333 333 333 fm | 27 666 666 666 667 fm | 28 000 000 000 000 fm | 28 333 333 333 333 fm | 28 666 666 666 667 fm | 29 000 000 000 000 fm | 29 333 333 333 333 fm | 29 666 666 666 667 fm | 30 000 000 000 000 fm | 30 333 333 333 333 fm | 30 666 666 666 667 fm | 31 000 000 000 000 fm | 31 333 333 333 333 fm | 31 666 666 666 667 fm | 32 000 000 000 000 fm | 32 333 333 333 333 fm | 32 666 666 666 667 fm | 33 000 000 000 000 fm | 33 333 333 333 333 fm |
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).
| 1 french; charriere = 333333333333.33 fermi | 4 french; charriere = 1333333333333.3 fermi |
| 1.5 french; charriere = 500000000000 fermi | 4.5 french; charriere = 1500000000000 fermi |
| 2 french; charriere = 666666666666.67 fermi | 5 french; charriere = 1666666666666.7 fermi |
| 2.5 french; charriere = 833333333333.33 fermi | 5.5 french; charriere = 1833333333333.3 fermi |
| 3 french; charriere = 1000000000000 fermi | 6 french; charriere = 2000000000000 fermi |
The femtometre (American spelling femtometer, symbol fm derived from the Danish and Norwegian word femten, "fifteen"+Ancient Greek: μέτρον, metrοn, "unit of measurement") is an SI unit of length equal to 10−15 metres, which means a quadrillionth of one. This distance can also be called a fermi and was so named in honour of physicist Enrico Fermi, as it is a typical length-scale of nuclear physics.
| 1 fermi = 3.0E-12 french; charriere | 4 fermi = 1.2E-11 french; charriere |
| 1.5 fermi = 4.5E-12 french; charriere | 4.5 fermi = 1.35E-11 french; charriere |
| 2 fermi = 6.0E-12 french; charriere | 5 fermi = 1.5E-11 french; charriere |
| 2.5 fermi = 7.5E-12 french; charriere | 5.5 fermi = 1.65E-11 french; charriere |
| 3 fermi = 9.0E-12 french; charriere | 6 fermi = 1.8E-11 french; charriere |
| 1 french; charriere = 333,333,333,333.33 fermi |
| 1 fermi = 3.0 × 10-12 french; charriere |