Length and Distance Conversions
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Distance is a numerical description of how far apart objects are. In physics or everyday discussion, distance may refer to a physical length, or an estimation based on other criteria (e.g. "two counties over").
In mathematics, a distance function or metric is a generalization of the concept of physical distance. A metric is a function that behaves according to a specific set of rules, and provides a concrete way of describing what it means for elements of some
space to be "close to" or "far away from" each other.
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Various distance definitions are possible between objects. For example, between celestial bodies one should not confuse the surface-to-surface distance and the center-to-center distance. If the former is much less than the latter, as for a LEO, the first
tends to be quoted (altitude), otherwise, e.g. for the Earth-Moon distance, the latter.
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| Metric |
| kilometer,km | - |
| meter,m | - |
| decimeter,dm | - |
| centimeter,cm | - |
| millimeter,mm | - |
| micrometre (micron) | - |
| nanometer,nm | - |
| angstrom | - |
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| British (Imperial) And U.S. System |
| league | - |
| mile,mi | - |
| furlong | - |
| chain | - |
| rod,rd | - |
| perch | - |
| yard,yd | - |
| foot,ft | - |
| link | - |
| hand | - |
| inch,in | - |
| line | - |
| mil | - |
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| Japanese |
| ri | - |
| kairi | - |
| cho | - |
| jyo | - |
| ken | - |
| shyaku | - |
| sun | - |
| mon | - |
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| Chinese Imperial |
| li | - |
| yin | - |
| zhang | - |
| bu | - |
| chi | - |
| cun | - |
| fen | - |
| li (small) | - |
| hao | - |
| si | - |
| hu | - |
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| Thai |
| yote | - |
| sen | - |
| wah | - |
| sawk | - |
| keub | - |
| nieu | - |
| kabiet | - |
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| Nautical |
| sea league | - |
| sea mile | - |
| cable | - |
| short cable | - |
| fathom | - |
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| Geographical (German) |
| geographical mile | - |
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| Typographical (British and U.S. - ATA system) |
| pica | - |
| pica [PostScript] | - |
| point,pt | - |
| point [PostScript],pt | - |
| pixel,px | - |
| twip | - |
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| Typographical (Europe - Didot system) |
| cicero | - |
| point,pt | - |
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| Astronomical |
| red shift,z | - |
| parsec,pc | - |
| light year | - |
| astronomical unit,au | - |
| light minute | - |
| light second | - |
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| Old Russian |
| mile | - |
| verst | - |
| mezhevaya verst | - |
| kosaya sazhen | - |
| sazhen | - |
| makhovaya sazhen | - |
| arshin | - |
| ell | - |
| foot | - |
| line | - |
| inch | - |
| vershok | - |
| pyad | - |
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| Old French |
| lieue commune | - |
| lieue marine | - |
| lieue de post | - |
| lieue metrique | - |
| arpent | - |
| perche | - |
| toise | - |
| pied-foot | - |
| pouce-inch | - |
| ligne | - |
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| Old Spanish and Portuguese |
| legua | - |
| paso | - |
| vara | - |
| pie | - |
| pulgada | - |
| linea | - |
| punto | - |
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| Ancient Roman |
| millarium | - |
| akt | - |
| decimpeda | - |
| pace | - |
| cubit | - |
| ped (foot) legal | - |
| ped ordinary | - |
| ounce (inch) | - |
| digit | - |
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| Ancient Greek |
| stadium olympic | - |
| stadium attic | - |
| stadium ptolemey | - |
| thousand of orgium | - |
| mile | - |
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| Biblical |
| cubit | - |
| span | - |
| handbreadth | - |
| etzbah | - |
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PLEASE NOTE: Directed distances are distances with a direction or sense. They can be determined along straight lines and along curved lines. A directed distance along a straight line from A to B is a vector joining any two points in a
n-dimensional Euclidean vector space. A directed distance along a curved line is not a vector and is represented by a segment of that curved line defined by endpoints A and B, with some specific information indicating the sense (or direction) of an ideal or real
motion from one endpoint of the segment to the other (see figure). For instance, just labelling the two endpoints as A and B can indicate the sense, if the ordered sequence (A, B) is assumed, which implies that A is the starting point.
Available Conversion Units: angstrom ) meter (m) 1.0 E-10
angstrom ) nanometer (nm) 1.0 E-01
astronomical unit (AU) meter (m) 1.495 979 E+11
chain (based on U.S. survey foot) (ch) meter (m) 2.011 684 E+01
fathom (based on U.S. survey foot) meter (m) 1.828 804 E+00
fermi meter (m) 1.0 E-15
fermi femtometer (fm) 1.0 E+00
foot (ft) meter (m) 3.048 E-01
foot (U.S. survey) (ft) meter (m) 3.048 006 E-01
inch (in) meter (m) 2.54 E-02
inch (in) centimeter (cm) 2.54 E+00
kayser (K) reciprocal meter(m-1) 1 E+02
light year (l.y.) meter (m) 9.460 73 E+15
microinch meter (m) 2.54 E208
microinch micrometer (mm) 2.54 E202
micron (m) meter (m) 1.0 E-06
micron (m) micrometer (mm) 1.0 E+00
mil (0.001 in) meter (m) 2.54 E-05
mil (0.001 in) millimeter (mm) 2.54 E-02
mile (mi) meter (m) 1.609 344 E+03
mile (mi) kilometer (km) 1.609 344 E+00
mile (based on U.S. survey foot) (mi) meter (m) 1.609 347 E+03
mile (based on U.S. survey foot) (mi) kilometer (km) 1.609 347 E+00
mile, nautical meter (m) 1.852 E+03
parsec (pc) meter (m) 3.085 678 E+16
pica (computer) (1/6 in) meter (m) 4.233 333 E-03
pica (computer) (1/6 in) millimeter (mm) 4.233 333 E+00
pica (printer's) meter (m) 4.217 518 E-03
pica (printer's) millimeter (mm) 4.217 518 E+00
point (computer) (1/72 in) meter (m) 3.527 778 E-04
point (computer) (1/72 in) millimeter (mm) 3.527 778 E-01
point (printer's) meter (m) 3.514 598 E-04
point (printer's) millimeter (mm) 3.514 598 E-01
rod (based on U.S. survey foot) (rd) meter (m) 5.029 210 E+00
yard (yd) meter (m) 9.144 E-01
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