fermtometer | 1 fm | 2 fm | 3 fm | 4 fm | 5 fm | 6 fm | 7 fm | 8 fm | 9 fm | 10 fm | 11 fm | 12 fm | 13 fm | 14 fm | 15 fm | 16 fm | 17 fm | 18 fm | 19 fm | 20 fm | 21 fm | 22 fm | 23 fm | 24 fm | 25 fm | 26 fm | 27 fm | 28 fm | 29 fm | 30 fm | 31 fm | 32 fm | 33 fm | 34 fm | 35 fm | 36 fm | 37 fm | 38 fm | 39 fm | 40 fm | 41 fm | 42 fm | 43 fm | 44 fm | 45 fm | 46 fm | 47 fm | 48 fm | 49 fm | 50 fm | 51 fm | 52 fm | 53 fm | 54 fm | 55 fm | 56 fm | 57 fm | 58 fm | 59 fm | 60 fm | 61 fm | 62 fm | 63 fm | 64 fm | 65 fm | 66 fm | 67 fm | 68 fm | 69 fm | 70 fm | 71 fm | 72 fm | 73 fm | 74 fm | 75 fm | 76 fm | 77 fm | 78 fm | 79 fm | 80 fm | 81 fm | 82 fm | 83 fm | 84 fm | 85 fm | 86 fm | 87 fm | 88 fm | 89 fm | 90 fm | 91 fm | 92 fm | 93 fm | 94 fm | 95 fm | 96 fm | 97 fm | 98 fm | 99 fm | 100 fm |
cable length (imperial) | 5.3961182483768 × 10-18 cable length (imperial) | 1.0792236496754 × 10-17 cable length (imperial) | 1.6188354745131 × 10-17 cable length (imperial) | 2.1584472993507 × 10-17 cable length (imperial) | 2.6980591241884 × 10-17 cable length (imperial) | 3.2376709490261 × 10-17 cable length (imperial) | 3.7772827738638 × 10-17 cable length (imperial) | 4.3168945987015 × 10-17 cable length (imperial) | 4.8565064235392 × 10-17 cable length (imperial) | 5.3961182483768 × 10-17 cable length (imperial) | 5.9357300732145 × 10-17 cable length (imperial) | 6.4753418980522 × 10-17 cable length (imperial) | 7.0149537228899 × 10-17 cable length (imperial) | 7.5545655477276 × 10-17 cable length (imperial) | 8.0941773725653 × 10-17 cable length (imperial) | 8.633789197403 × 10-17 cable length (imperial) | 9.1734010222406 × 10-17 cable length (imperial) | 9.7130128470783 × 10-17 cable length (imperial) | 1.0252624671916 × 10-16 cable length (imperial) | 1.0792236496754 × 10-16 cable length (imperial) | 1.1331848321591 × 10-16 cable length (imperial) | 1.1871460146429 × 10-16 cable length (imperial) | 1.2411071971267 × 10-16 cable length (imperial) | 1.2950683796104 × 10-16 cable length (imperial) | 1.3490295620942 × 10-16 cable length (imperial) | 1.402990744578 × 10-16 cable length (imperial) | 1.4569519270617 × 10-16 cable length (imperial) | 1.5109131095455 × 10-16 cable length (imperial) | 1.5648742920293 × 10-16 cable length (imperial) | 1.6188354745131 × 10-16 cable length (imperial) | 1.6727966569968 × 10-16 cable length (imperial) | 1.7267578394806 × 10-16 cable length (imperial) | 1.7807190219644 × 10-16 cable length (imperial) | 1.8346802044481 × 10-16 cable length (imperial) | 1.8886413869319 × 10-16 cable length (imperial) | 1.9426025694157 × 10-16 cable length (imperial) | 1.9965637518994 × 10-16 cable length (imperial) | 2.0505249343832 × 10-16 cable length (imperial) | 2.104486116867 × 10-16 cable length (imperial) | 2.1584472993507 × 10-16 cable length (imperial) | 2.2124084818345 × 10-16 cable length (imperial) | 2.2663696643183 × 10-16 cable length (imperial) | 2.320330846802 × 10-16 cable length (imperial) | 2.3742920292858 × 10-16 cable length (imperial) | 2.4282532117696 × 10-16 cable length (imperial) | 2.4822143942534 × 10-16 cable length (imperial) | 2.5361755767371 × 10-16 cable length (imperial) | 2.5901367592209 × 10-16 cable length (imperial) | 2.6440979417047 × 10-16 cable length (imperial) | 2.6980591241884 × 10-16 cable length (imperial) | 2.7520203066722 × 10-16 cable length (imperial) | 2.805981489156 × 10-16 cable length (imperial) | 2.8599426716397 × 10-16 cable length (imperial) | 2.9139038541235 × 10-16 cable length (imperial) | 2.9678650366073 × 10-16 cable length (imperial) | 3.021826219091 × 10-16 cable length (imperial) | 3.0757874015748 × 10-16 cable length (imperial) | 3.1297485840586 × 10-16 cable length (imperial) | 3.1837097665423 × 10-16 cable length (imperial) | 3.2376709490261 × 10-16 cable length (imperial) | 3.2916321315099 × 10-16 cable length (imperial) | 3.3455933139936 × 10-16 cable length (imperial) | 3.3995544964774 × 10-16 cable length (imperial) | 3.4535156789612 × 10-16 cable length (imperial) | 3.507476861445 × 10-16 cable length (imperial) | 3.5614380439287 × 10-16 cable length (imperial) | 3.6153992264125 × 10-16 cable length (imperial) | 3.6693604088963 × 10-16 cable length (imperial) | 3.72332159138 × 10-16 cable length (imperial) | 3.7772827738638 × 10-16 cable length (imperial) | 3.8312439563476 × 10-16 cable length (imperial) | 3.8852051388313 × 10-16 cable length (imperial) | 3.9391663213151 × 10-16 cable length (imperial) | 3.9931275037989 × 10-16 cable length (imperial) | 4.0470886862826 × 10-16 cable length (imperial) | 4.1010498687664 × 10-16 cable length (imperial) | 4.1550110512502 × 10-16 cable length (imperial) | 4.2089722337339 × 10-16 cable length (imperial) | 4.2629334162177 × 10-16 cable length (imperial) | 4.3168945987015 × 10-16 cable length (imperial) | 4.3708557811852 × 10-16 cable length (imperial) | 4.424816963669 × 10-16 cable length (imperial) | 4.4787781461528 × 10-16 cable length (imperial) | 4.5327393286366 × 10-16 cable length (imperial) | 4.5867005111203 × 10-16 cable length (imperial) | 4.6406616936041 × 10-16 cable length (imperial) | 4.6946228760879 × 10-16 cable length (imperial) | 4.7485840585716 × 10-16 cable length (imperial) | 4.8025452410554 × 10-16 cable length (imperial) | 4.8565064235392 × 10-16 cable length (imperial) | 4.9104676060229 × 10-16 cable length (imperial) | 4.9644287885067 × 10-16 cable length (imperial) | 5.0183899709905 × 10-16 cable length (imperial) | 5.0723511534742 × 10-16 cable length (imperial) | 5.126312335958 × 10-16 cable length (imperial) | 5.1802735184418 × 10-16 cable length (imperial) | 5.2342347009255 × 10-16 cable length (imperial) | 5.2881958834093 × 10-16 cable length (imperial) | 5.3421570658931 × 10-16 cable length (imperial) | 5.3961182483768 × 10-16 cable length (imperial) |
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.
Name of unit | Symbol | Definition | Relation to SI units | Unit System |
---|---|---|---|---|
fermtometer | fm | 1000 attometres = 1 femtometre = 1 fermi = 0.001 picometre = 1×10−15 metres 1000000 femtometres = 10 ångström = 1 nanometre. | ≡ 1×10-15 m | Metric system SI |
fermtometers | cable length (imperial) | fermtometers | cable length (imperial) |
---|---|---|---|
1 | ≈ 5.3961182483768E-18 | 4 | ≈ 2.1584472993507E-17 |
1.5 | ≈ 8.0941773725653E-18 | 4.5 | ≈ 2.4282532117696E-17 |
2 | ≈ 1.0792236496754E-17 | 5 | ≈ 2.6980591241884E-17 |
2.5 | ≈ 1.3490295620942E-17 | 5.5 | ≈ 2.9678650366073E-17 |
3 | ≈ 1.6188354745131E-17 | 6 | ≈ 3.2376709490261E-17 |
A cable length or length of cable is a nautical unit of measure equal to one tenth of a nautical mile or approximately 100 fathoms. The unit is named after the length of a ship's anchor cable in the Age of Sail. The definition varies:
Name of unit | Symbol | Definition | Relation to SI units | Unit System |
---|---|---|---|---|
cable length (imperial) | ≡ 608 ft | ≈ 185.3184 m | Imperial/US |
cable length (imperial) | fermtometers | cable length (imperial) | fermtometers |
---|---|---|---|
1 | ≈ 1.853184E+17 | 4 | ≈ 7.412736E+17 |
1.5 | ≈ 2.779776E+17 | 4.5 | ≈ 8.339328E+17 |
2 | ≈ 3.706368E+17 | 5 | ≈ 9.26592E+17 |
2.5 | ≈ 4.63296E+17 | 5.5 | ≈ 1.0192512E+18 |
3 | ≈ 5.559552E+17 | 6 | ≈ 1.1119104E+18 |
fermtometers | cable length (imperial) |
---|---|
1 | ≈ 5.3961182483768 × 10-18 |
1.853184 × 1017 | ≈ 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 …) |