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Light Years

A light-year (abbreviation: ly), sometimes referred to incorrectly as a light year, is a unit of length used informally to express astronomical distances. It is approximately 9 trillion kilometers or 6 trillion miles. As defined by the International Astronomical Union (IAU), a light-year is the distance that light travels in vacuum in one Julian year (365.25 days). Because it includes the word year, the term light-year is sometimes misinterpreted as a unit of time.

The light-year is most often used when expressing distances to stars and other distances on a galactic scale, especially in non-specialist and popular science publications. The unit usually used in professional astrometry is the parsec (symbol: pc, approximately 3.26 light-years; the distance at which one astronomical unit subtends an angle of one second of arc).

Light Years
Symbol/abbreviation: ly
Unit of: LENGTH
LENGTH's base unit: meters (SI Unit)
In relation to the base unit (meters), 1 Light Years = 9461000000000000 meters.
[Conversion table] 1 Light Years (ly) to all length units
1 ly= 5.2147244094365E+18 agate [typography] (agate)
1 ly= 1.5933564396121E+16 alens (aln)
1 ly= 9.461E+25 angstroms (Å)
1 ly= 63242.878763782 astronomical unit (au)
1 ly= 9.461E+33 attometers (am)
1 ly= 80103293539920 barleycorns (bcorn)
1 ly= 9.461E+27 bicrons (μμ)
1 ly= 1.7878705990623E+26 bohr radius (Bohr)
1 ly= 51052674747893 cable length uk (cbl[UK])
1 ly= 43111147564888 cable length us (cbl[US])
1 ly= 3.7248031496063E+19 calibers (cal)
1 ly= 3.7248031496063E+19 centiinch (cin)
1 ly= 9.461E+17 centimeters (cm)
1 ly= 4.7030342798059E+14 chains (ch)
1 ly= 2.0693350831146E+16 cubits (cbt)
1 ly= 946100000000000 decameters (dam)
1 ly= 9.461E+16 decimeters (dm)
1 ly= 2.5164093106857E+19 didot points (didot point)
1 ly= 4.9664041994751E+17 digits (digit)
1 ly= 8.2773403324584E+15 ells (eel)
1 ly= 2.243262719283E+18 ems (EM)
1 ly= 0.009461 exameters (Em)
1 ly= 5.1733377077865E+15 fathoms (fath)
1 ly= 3.1040026246719E+16 feet (ft)
1 ly= 9.461E+30 femtometers (fm)
1 ly= 9.461E+30 fermi (fermi)
1 ly= 8.2773403324584E+16 finger cloth (finer)
1 ly= 4.2569178852643E+17 fingerbreadth (fb)
1 ly= 3.0120980579433E+16 fods (fod)
1 ly= 47030342798059 furlongs (fur)
1 ly= 9461000 gigameters (Gm)
1 ly= 3.0717532467532E+14 greek plethron (pleth)
1 ly= 51140540540541 greek stadion (std)
1 ly= 9.3120078740157E+16 hands (h)
1 ly= 94610000000000 hectometers (hm)
1 ly= 9.461E+20 himetrics (hiMetric)
1 ly= 4.9887058357428E+15 hvats (hvat)
1 ly= 3.7248031496063E+17 inches (in)
1 ly= 9461000000000 kilometers (km)
1 ly= 0.00030657809462087 kiloparsecs (kpc)
1 ly= 365.28957528958 light days (ld)
1 ly= 8768.3039851715 light hours (lh)
1 ly= 525903.27959978 light minutes (lmin)
1 ly= 12.174752284133 light months (lm)
1 ly= 31557705.136758 light seconds (ls)
1 ly= 1 light years (ly)
1 ly= 4.5052380952381E+18 lines (l)
1 ly= 4.7030248737328E+16 links (li)
1 ly= 9461000000 megameters (Mm)
1 ly= 9461000000000000 meters (m)
1 ly= 3.7248031496063E+23 microinches (μin)
1 ly= 9.461E+21 micrometers (μm)
1 ly= 9.461E+27 micromicrons (μμm)
1 ly= 5878792849757.4 miles (mi)
1 ly= 9.461E+18 millimeters (mm)
1 ly= 3.7248031496063E+20 mils (mil)
1 ly= 946100000000 myriameters (Mym)
1 ly= 1.6554680664917E+17 nails cloth (nail)
1 ly= 9.461E+24 nanometers (nm)
1 ly= 1702843772498.2 nautical leagues (Nl)
1 ly= 5108531317494.6 nautical miles (NM)
1 ly= 1.2416010498688E+16 paces (pace)
1 ly= 1.2416010498688E+17 palms (palm)
1 ly= 0.30661012857433 parsecs (pc)
1 ly= 1.8812137119224E+15 perch (perch)
1 ly= 9.461 petameters (Pm)
1 ly= 2.2348818915235E+18 picas (p)
1 ly= 9.461E+27 picometers (pm)
1 ly= 3.575811474118E+19 pixels (PX)
1 ly= 5.913125E+50 planck length (pl)
1 ly= 2.6818565783581E+19 points (pt)
1 ly= 1.8812137119224E+15 poles (pole)
1 ly= 2.1284589426322E+17 rack unit (ru)
1 ly= 2.2348821713237E+18 rems (rem)
1 ly= 1.8812137119224E+15 rods (rd)
1 ly= 2.6650704225352E+14 roman actus (actus)
1 ly= 1.552001312336E+15 ropes (rope)
1 ly= 946100000000 scandinavian miles (mil[Scandinavian])
1 ly= 4.1386701662292E+16 spans (span)
1 ly= 9461 terameters (Tm)
1 ly= 3.7248031496063E+20 thou (th)
1 ly= 5.3636827484551E+20 twips (twip)
1 ly= 1.0924942263279E+16 varas [Argentina] (vr[Argentina])
1 ly= 1.1287259648537E+16 varas [California] (vr[California])
1 ly= 1.0950231481481E+16 varas [Latin America] (vr[Latin])
1 ly= 1.1289706689578E+16 varas [Mexico] (vr[Mexico])
1 ly= 1.1318339514296E+16 varas [Spanish] (vr[Spanish])
1 ly= 1.1174365455254E+16 varas [Texas] (vr[Texas])
1 ly= 8868578927634 versts (vst)
1 ly= 9.4420780755366E+28 x unit (xu)
1 ly= 1.0346675415573E+16 yards (yd)
1 ly= 9.461E+39 yoctometers (ym)
1 ly= 9.461E-9 yottameters (Ym)
1 ly= 9.461E+36 zeptometers (zm)
1 ly= 9.461E-6 zettameters (Zm)
1 ly= 3.7248031496063E+17 zolls (zoll)