| 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 |
| hubble length | 7.3404403509459 × 10-42 hubble length | 1.4680880701892 × 10-41 hubble length | 2.2021321052838 × 10-41 hubble length | 2.9361761403783 × 10-41 hubble length | 3.6702201754729 × 10-41 hubble length | 4.4042642105675 × 10-41 hubble length | 5.1383082456621 × 10-41 hubble length | 5.8723522807567 × 10-41 hubble length | 6.6063963158513 × 10-41 hubble length | 7.3404403509459 × 10-41 hubble length | 8.0744843860404 × 10-41 hubble length | 8.808528421135 × 10-41 hubble length | 9.5425724562296 × 10-41 hubble length | 1.0276616491324 × 10-40 hubble length | 1.1010660526419 × 10-40 hubble length | 1.1744704561513 × 10-40 hubble length | 1.2478748596608 × 10-40 hubble length | 1.3212792631703 × 10-40 hubble length | 1.3946836666797 × 10-40 hubble length | 1.4680880701892 × 10-40 hubble length | 1.5414924736986 × 10-40 hubble length | 1.6148968772081 × 10-40 hubble length | 1.6883012807175 × 10-40 hubble length | 1.761705684227 × 10-40 hubble length | 1.8351100877365 × 10-40 hubble length | 1.9085144912459 × 10-40 hubble length | 1.9819188947554 × 10-40 hubble length | 2.0553232982648 × 10-40 hubble length | 2.1287277017743 × 10-40 hubble length | 2.2021321052838 × 10-40 hubble length | 2.2755365087932 × 10-40 hubble length | 2.3489409123027 × 10-40 hubble length | 2.4223453158121 × 10-40 hubble length | 2.4957497193216 × 10-40 hubble length | 2.569154122831 × 10-40 hubble length | 2.6425585263405 × 10-40 hubble length | 2.71596292985 × 10-40 hubble length | 2.7893673333594 × 10-40 hubble length | 2.8627717368689 × 10-40 hubble length | 2.9361761403783 × 10-40 hubble length | 3.0095805438878 × 10-40 hubble length | 3.0829849473973 × 10-40 hubble length | 3.1563893509067 × 10-40 hubble length | 3.2297937544162 × 10-40 hubble length | 3.3031981579256 × 10-40 hubble length | 3.3766025614351 × 10-40 hubble length | 3.4500069649446 × 10-40 hubble length | 3.523411368454 × 10-40 hubble length | 3.5968157719635 × 10-40 hubble length | 3.6702201754729 × 10-40 hubble length | 3.7436245789824 × 10-40 hubble length | 3.8170289824918 × 10-40 hubble length | 3.8904333860013 × 10-40 hubble length | 3.9638377895108 × 10-40 hubble length | 4.0372421930202 × 10-40 hubble length | 4.1106465965297 × 10-40 hubble length | 4.1840510000391 × 10-40 hubble length | 4.2574554035486 × 10-40 hubble length | 4.3308598070581 × 10-40 hubble length | 4.4042642105675 × 10-40 hubble length | 4.477668614077 × 10-40 hubble length | 4.5510730175864 × 10-40 hubble length | 4.6244774210959 × 10-40 hubble length | 4.6978818246053 × 10-40 hubble length | 4.7712862281148 × 10-40 hubble length | 4.8446906316243 × 10-40 hubble length | 4.9180950351337 × 10-40 hubble length | 4.9914994386432 × 10-40 hubble length | 5.0649038421526 × 10-40 hubble length | 5.1383082456621 × 10-40 hubble length | 5.2117126491716 × 10-40 hubble length | 5.285117052681 × 10-40 hubble length | 5.3585214561905 × 10-40 hubble length | 5.4319258596999 × 10-40 hubble length | 5.5053302632094 × 10-40 hubble length | 5.5787346667188 × 10-40 hubble length | 5.6521390702283 × 10-40 hubble length | 5.7255434737378 × 10-40 hubble length | 5.7989478772472 × 10-40 hubble length | 5.8723522807567 × 10-40 hubble length | 5.9457566842661 × 10-40 hubble length | 6.0191610877756 × 10-40 hubble length | 6.0925654912851 × 10-40 hubble length | 6.1659698947945 × 10-40 hubble length | 6.239374298304 × 10-40 hubble length | 6.3127787018134 × 10-40 hubble length | 6.3861831053229 × 10-40 hubble length | 6.4595875088324 × 10-40 hubble length | 6.5329919123418 × 10-40 hubble length | 6.6063963158513 × 10-40 hubble length | 6.6798007193607 × 10-40 hubble length | 6.7532051228702 × 10-40 hubble length | 6.8266095263796 × 10-40 hubble length | 6.9000139298891 × 10-40 hubble length | 6.9734183333986 × 10-40 hubble length | 7.046822736908 × 10-40 hubble length | 7.1202271404175 × 10-40 hubble length | 7.1936315439269 × 10-40 hubble length | 7.2670359474364 × 10-40 hubble length | 7.3404403509459 × 10-40 hubble length |
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 | Hubble length | fermtometers | Hubble length |
|---|---|---|---|
| 1 | ≈ 7.3404403509459E-42 | 4 | ≈ 2.9361761403783E-41 |
| 1.5 | ≈ 1.1010660526419E-41 | 4.5 | ≈ 3.3031981579256E-41 |
| 2 | ≈ 1.4680880701892E-41 | 5 | ≈ 3.6702201754729E-41 |
| 2.5 | ≈ 1.8351100877365E-41 | 5.5 | ≈ 4.0372421930202E-41 |
| 3 | ≈ 2.2021321052838E-41 | 6 | ≈ 4.4042642105675E-41 |
The Hubble length or Hubble distance is a unit of distance in cosmology, defined as cH0−1 — the speed of light multiplied by the Hubble time. It is equivalent to 4,550 million parsecs or 14.4 billion light years. (The numerical value of the Hubble length in light years is, by definition, equal to that of the Hubble time in years.) The Hubble distance would be the distance between the Earth and the galaxies which are currently receding from us at the speed of light, as can be seen by substituting D = c/H0 into the equation for Hubble's law, v = H0D.
| Name of unit | Symbol | Definition | Relation to SI units | Unit System |
|---|---|---|---|---|
| hubble length | ≈ 14.4 billion light-years ≈ 4.55 gigaparsecs | ≈ 1.3623160903026E+26 m | Science - Astronomy (Length) |
| Hubble length | fermtometers | Hubble length | fermtometers |
|---|---|---|---|
| 1 | ≈ 1.3623160903026E+41 | 4 | ≈ 5.4492643612104E+41 |
| 1.5 | ≈ 2.0434741354539E+41 | 4.5 | ≈ 6.1304224063617E+41 |
| 2 | ≈ 2.7246321806052E+41 | 5 | ≈ 6.811580451513E+41 |
| 2.5 | ≈ 3.4057902257565E+41 | 5.5 | ≈ 7.4927384966643E+41 |
| 3 | ≈ 4.0869482709078E+41 | 6 | ≈ 8.1738965418156E+41 |
| fermtometers | Hubble length |
|---|---|
| 1 | ≈ 7.3404403509459 × 10-42 |
| 1.3623160903026 × 1041 | ≈ 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 …) |