| light-hour | 1 light-hour | 2 light-hour | 3 light-hour | 4 light-hour | 5 light-hour | 6 light-hour | 7 light-hour | 8 light-hour | 9 light-hour | 10 light-hour | 11 light-hour | 12 light-hour | 13 light-hour | 14 light-hour | 15 light-hour | 16 light-hour | 17 light-hour | 18 light-hour | 19 light-hour | 20 light-hour | 21 light-hour | 22 light-hour | 23 light-hour | 24 light-hour | 25 light-hour | 26 light-hour | 27 light-hour | 28 light-hour | 29 light-hour | 30 light-hour | 31 light-hour | 32 light-hour | 33 light-hour | 34 light-hour | 35 light-hour | 36 light-hour | 37 light-hour | 38 light-hour | 39 light-hour | 40 light-hour | 41 light-hour | 42 light-hour | 43 light-hour | 44 light-hour | 45 light-hour | 46 light-hour | 47 light-hour | 48 light-hour | 49 light-hour | 50 light-hour | 51 light-hour | 52 light-hour | 53 light-hour | 54 light-hour | 55 light-hour | 56 light-hour | 57 light-hour | 58 light-hour | 59 light-hour | 60 light-hour | 61 light-hour | 62 light-hour | 63 light-hour | 64 light-hour | 65 light-hour | 66 light-hour | 67 light-hour | 68 light-hour | 69 light-hour | 70 light-hour | 71 light-hour | 72 light-hour | 73 light-hour | 74 light-hour | 75 light-hour | 76 light-hour | 77 light-hour | 78 light-hour | 79 light-hour | 80 light-hour | 81 light-hour | 82 light-hour | 83 light-hour | 84 light-hour | 85 light-hour | 86 light-hour | 87 light-hour | 88 light-hour | 89 light-hour | 90 light-hour | 91 light-hour | 92 light-hour | 93 light-hour | 94 light-hour | 95 light-hour | 96 light-hour | 97 light-hour | 98 light-hour | 99 light-hour | 100 light-hour |
| french; charriere | 3.2377585464 × 1015 F | 6.4755170928 × 1015 F | 9.7132756392 × 1015 F | 1.29510341856 × 1016 F | 1.6188792732 × 1016 F | 1.94265512784 × 1016 F | 2.26643098248 × 1016 F | 2.59020683712 × 1016 F | 2.91398269176 × 1016 F | 3.2377585464 × 1016 F | 3.56153440104 × 1016 F | 3.88531025568 × 1016 F | 4.20908611032 × 1016 F | 4.53286196496 × 1016 F | 4.8566378196 × 1016 F | 5.18041367424 × 1016 F | 5.50418952888 × 1016 F | 5.82796538352 × 1016 F | 6.15174123816 × 1016 F | 6.4755170928 × 1016 F | 6.79929294744 × 1016 F | 7.12306880208 × 1016 F | 7.44684465672 × 1016 F | 7.77062051136 × 1016 F | 8.094396366 × 1016 F | 8.41817222064 × 1016 F | 8.74194807528 × 1016 F | 9.06572392992 × 1016 F | 9.38949978456 × 1016 F | 9.7132756392 × 1016 F | 1.003705149384 × 1017 F | 1.036082734848 × 1017 F | 1.068460320312 × 1017 F | 1.100837905776 × 1017 F | 1.13321549124 × 1017 F | 1.165593076704 × 1017 F | 1.197970662168 × 1017 F | 1.230348247632 × 1017 F | 1.262725833096 × 1017 F | 1.29510341856 × 1017 F | 1.327481004024 × 1017 F | 1.359858589488 × 1017 F | 1.392236174952 × 1017 F | 1.424613760416 × 1017 F | 1.45699134588 × 1017 F | 1.489368931344 × 1017 F | 1.521746516808 × 1017 F | 1.554124102272 × 1017 F | 1.586501687736 × 1017 F | 1.6188792732 × 1017 F | 1.651256858664 × 1017 F | 1.683634444128 × 1017 F | 1.716012029592 × 1017 F | 1.748389615056 × 1017 F | 1.78076720052 × 1017 F | 1.813144785984 × 1017 F | 1.845522371448 × 1017 F | 1.877899956912 × 1017 F | 1.910277542376 × 1017 F | 1.94265512784 × 1017 F | 1.975032713304 × 1017 F | 2.007410298768 × 1017 F | 2.039787884232 × 1017 F | 2.072165469696 × 1017 F | 2.10454305516 × 1017 F | 2.136920640624 × 1017 F | 2.169298226088 × 1017 F | 2.201675811552 × 1017 F | 2.234053397016 × 1017 F | 2.26643098248 × 1017 F | 2.298808567944 × 1017 F | 2.331186153408 × 1017 F | 2.363563738872 × 1017 F | 2.395941324336 × 1017 F | 2.4283189098 × 1017 F | 2.460696495264 × 1017 F | 2.493074080728 × 1017 F | 2.525451666192 × 1017 F | 2.557829251656 × 1017 F | 2.59020683712 × 1017 F | 2.622584422584 × 1017 F | 2.654962008048 × 1017 F | 2.687339593512 × 1017 F | 2.719717178976 × 1017 F | 2.75209476444 × 1017 F | 2.784472349904 × 1017 F | 2.816849935368 × 1017 F | 2.849227520832 × 1017 F | 2.881605106296 × 1017 F | 2.91398269176 × 1017 F | 2.946360277224 × 1017 F | 2.978737862688 × 1017 F | 3.011115448152 × 1017 F | 3.043493033616 × 1017 F | 3.07587061908 × 1017 F | 3.108248204544 × 1017 F | 3.140625790008 × 1017 F | 3.173003375472 × 1017 F | 3.205380960936 × 1017 F | 3.2377585464 × 1017 F |
The light-hour is a unit of length useful in astronomy, telecommunications and relativistic physics. It is defined as the distance that light travels in free space in onehour, and is equal to exactly 1.0792528488×1012 metres.
| Name of unit | Symbol | Definition | Relation to SI units | Unit System |
|---|---|---|---|---|
| light-hour | ≡ 60 light-minutes | ≡ 1.0792528488×1012 m | Science - Astronomy (Length) |
| light-hours | french; charriere | light-hours | french; charriere |
|---|---|---|---|
| 1 | = 3.2377585464E+15 | 4 | = 1.29510341856E+16 |
| 1.5 | = 4.8566378196E+15 | 4.5 | = 1.45699134588E+16 |
| 2 | = 6.4755170928E+15 | 5 | = 1.6188792732E+16 |
| 2.5 | = 8.094396366E+15 | 5.5 | = 1.78076720052E+16 |
| 3 | = 9.7132756392E+15 | 6 | = 1.94265512784E+16 |
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 | light-hours | french; charriere | light-hours |
|---|---|---|---|
| 1 | = 3.0885564370199E-16 | 4 | = 1.235422574808E-15 |
| 1.5 | = 4.6328346555299E-16 | 4.5 | = 1.389850396659E-15 |
| 2 | = 6.1771128740399E-16 | 5 | = 1.54427821851E-15 |
| 2.5 | = 7.7213910925498E-16 | 5.5 | = 1.698706040361E-15 |
| 3 | = 9.2656693110598E-16 | 6 | = 1.853133862212E-15 |
| light-hours | french; charriere |
|---|---|
| 1 | = 3.2377585464 × 1015 |
| 3.0885564370199 × 10-16 | = 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 …) |