Conversion Master

Length Converter

Length Converter

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Length Conversion Units and Formulas

Length Conversion Units

Metric Units

  • Meter (m)
  • Kilometer (km)
  • Decimeter (dm)
  • Centimeter (cm)
  • Millimeter (mm)
  • Micrometer (µm)
  • Nanometer (nm)
  • Micron (µ)
  • Picometer (pm)
  • Femtometer (fm)
  • Attometer (am)
  • Exameter (Em)
  • Petameter (Pm)
  • Terameter (Tm)
  • Gigameter (Gm)
  • Megameter (Mm)
  • Hectometer (hm)
  • Dekameter (dam)

Imperial & US Units

  • Mile (mi)
  • Yard (yd)
  • Foot (ft)
  • Inch (in)
  • Mile (US Survey) (mi)
  • Mile (Roman)
  • Kiloyard (kyd)
  • Furlong (fur)
  • Furlong (US Survey) (fur)
  • Chain (ch)
  • Chain (US Survey) (ch)
  • Rope
  • Rod (rd)
  • Rod (US Survey) (rd)
  • Perch
  • Pole
  • Fathom (fath)
  • Fathom (US Survey) (fath)
  • Ell
  • Foot (US Survey) (ft)
  • Link (li)
  • Link (US Survey) (li)
  • Cubit (UK)
  • Hand
  • Span (cloth)
  • Finger (cloth)
  • Nail (cloth)
  • Inch (US Survey) (in)
  • Barleycorn

Special Units

  • Mil (mil, thou)
  • Microinch
  • Angstrom (A)
  • A.U. of Length (a.u., b)
  • X-unit (X)
  • Fermi (F, f)
  • Arpent
  • Pica
  • Point
  • Twip
  • Aln
  • Famn
  • Caliber (cl)
  • Centiinch (cin)
  • Ken
  • Russian Archin
  • Roman Actus
  • Vara de Tarea
  • Vara Conuquera
  • Vara Castellana
  • Cubit (Greek)
  • Long Reed
  • Reed
  • Long Cubit
  • Handbreadth
  • Fingerbreadth

Astronomical Units

  • Light Year (ly)
  • Megaparsec (Mpc)
  • Kiloparsec (kpc)
  • Parsec (pc)
  • Astronomical Unit (AU, UA)

Earth-Based Units

  • Earth’s Equatorial Radius
  • Earth’s Polar Radius
  • Earth’s Distance from Sun
  • Sun’s Radius

Length Conversion Formulas

Metric Units

  • Meter (m): 1 m = 1 m
  • Kilometer (km): 1 km = 1,000 m
  • Decimeter (dm): 1 dm = 0.1 m
  • Centimeter (cm): 1 cm = 0.01 m
  • Millimeter (mm): 1 mm = 0.001 m
  • Micrometer (µm): 1 µm = 1.0E-6 m
  • Nanometer (nm): 1 nm = 1.0E-9 m
  • Micron (µ): 1 µ = 1.0E-6 m
  • Picometer (pm): 1 pm = 1.0E-12 m
  • Femtometer (fm): 1 fm = 1.0E-15 m
  • Attometer (am): 1 am = 1.0E-18 m
  • Exameter (Em): 1 Em = 1.0E+18 m
  • Petameter (Pm): 1 Pm = 1.0E+15 m
  • Terameter (Tm): 1 Tm = 1.0E+12 m
  • Gigameter (Gm): 1 Gm = 1.0E+9 m
  • Megameter (Mm): 1 Mm = 1.0E+6 m
  • Hectometer (hm): 1 hm = 100 m
  • Dekameter (dam): 1 dam = 10 m

Imperial & US Units

  • Mile (mi): 1 mi = 1,609.344 m
  • Yard (yd): 1 yd = 0.9144 m
  • Foot (ft): 1 ft = 0.3048 m
  • Inch (in): 1 in = 0.0254 m
  • Mile (US Survey) (mi): 1 mi = 1,609.3472186944 m
  • Mile (Roman): 1 Roman Mile = 1,479.804 m
  • Kiloyard (kyd): 1 kyd = 914.4 m
  • Furlong (fur): 1 fur = 201.168 m
  • Furlong (US Survey) (fur): 1 fur = 201.1684023368 m
  • Chain (ch): 1 ch = 20.1168 m
  • Chain (US Survey) (ch): 1 ch = 20.1168402337 m
  • Rope: 1 rope = 6.096 m
  • Rod (rd): 1 rd = 5.0292 m
  • Rod (US Survey) (rd): 1 rd = 5.0292100584 m
  • Perch: 1 perch = 5.0292 m
  • Pole: 1 pole = 5.0292 m
  • Fathom (fath): 1 fath = 1.8288 m
  • Fathom (US Survey) (fath): 1 fath = 1.8288036576 m
  • Ell: 1 ell = 1.143 m
  • Foot (US Survey) (ft): 1 ft = 0.3048006096 m
  • Link (li): 1 li = 0.201168 m
  • Link (US Survey) (li): 1 li = 0.2011684023 m
  • Cubit (UK): 1 cubit = 0.4572 m
  • Hand: 1 hand = 0.1016 m
  • Span (cloth): 1 span = 0.2286 m
  • Finger (cloth): 1 finger = 0.1143 m
  • Nail (cloth): 1 nail = 0.05715 m
  • Inch (US Survey) (in): 1 in = 0.0254000508 m
  • Barleycorn: 1 barleycorn = 0.0084666667 m

Special Units

  • Mil (mil, thou): 1 mil = 2.54E-5 m
  • Microinch: 1 microinch = 2.54E-8 m
  • Angstrom (A): 1 Å = 1.0E-10 m
  • A.U. of Length (a.u., b): 1 a.u. = 5.2917724900001E-11 m
  • X-unit (X): 1 X = 1.00208E-13 m
  • Fermi (F, f): 1 F = 1.0E-15 m
  • Arpent: 1 arpent = 58.5216 m
  • Pica: 1 pica = 0.0042333333 m
  • Point: 1 point = 0.0003527778 m
  • Twip: 1 twip = 1.76389E-5 m
  • Aln: 1 aln = 0.5937777778 m
  • Famn: 1 famn = 1.7813333333 m
  • Caliber (cl): 1 cl = 0.000254 m
  • Centiinch (cin): 1 cin = 0.000254 m
  • Ken: 1 ken = 2.11836 m
  • Russian Archin: 1 archin = 0.7112 m
  • Roman Actus: 1 actus = 35.47872 m
  • Vara de Tarea: 1 vara de tarea = 2.505456 m
  • Vara Conuquera: 1 vara conuquera = 2.505456 m
  • Vara Castellana: 1 vara castellana = 0.835152 m
  • Cubit (Greek): 1 Greek cubit = 0.462788 m
  • Long Reed: 1 long reed = 3.2004 m
  • Reed: 1 reed = 2.7432 m
  • Long Cubit: 1 long cubit = 0.5334 m
  • Handbreadth: 1 handbreadth = 0.0762 m
  • Fingerbreadth: 1 fingerbreadth = 0.01905 m

Astronomical Units

  • Light Year (ly): 1 ly = 9.46073047258E+15 m
  • Megaparsec (Mpc): 1 Mpc = 3.08567758128E+22 m
  • Kiloparsec (kpc): 1 kpc = 3.08567758128E+19 m
  • Parsec (pc): 1 pc = 3.08567758128E+16 m
  • Astronomical Unit (AU, UA): 1 AU = 149,597,870,691 m

Earth-Based Units

  • Earth’s Equatorial Radius: 1 Earth’s Equatorial Radius = 6,378,160 m
  • Earth’s Polar Radius: 1 Earth’s Polar Radius = 6,356,776.9999999 m
  • Earth’s Distance from Sun: 1 Earth’s Distance from Sun = 149,600,000,000 m
  • Sun’s Radius: 1 Sun’s Radius = 696,000,000 m
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