1 astronomical units = 1.5812845149626 × 10-5light-years 

Astronomical units to Light-years Conversion

Astronomical unit to light-year conversion allow you make a conversion between astronomical unit and light-year easily. You can find the tool in the following.

Length Conversion


= 0.00001581
= 1.58128 × 10-5
= 1.58128E-5
= 1.58128e-5
= 0.00002372
= 2.37193 × 10-5
= 2.37193E-5
= 2.37193e-5
= 0.00003163
= 3.16257 × 10-5
= 3.16257E-5
= 3.16257e-5
= 0.00003953
= 3.95321 × 10-5
= 3.95321E-5
= 3.95321e-5
= 0.00004744
= 4.74385 × 10-5
= 4.74385E-5
= 4.74385e-5

Quick Look: astronomical units to light-years

astronomical unit1 AU2 AU3 AU4 AU5 AU6 AU7 AU8 AU9 AU10 AU11 AU12 AU13 AU14 AU15 AU16 AU17 AU18 AU19 AU20 AU21 AU22 AU23 AU24 AU25 AU26 AU27 AU28 AU29 AU30 AU31 AU32 AU33 AU34 AU35 AU36 AU37 AU38 AU39 AU40 AU41 AU42 AU43 AU44 AU45 AU46 AU47 AU48 AU49 AU50 AU51 AU52 AU53 AU54 AU55 AU56 AU57 AU58 AU59 AU60 AU61 AU62 AU63 AU64 AU65 AU66 AU67 AU68 AU69 AU70 AU71 AU72 AU73 AU74 AU75 AU76 AU77 AU78 AU79 AU80 AU81 AU82 AU83 AU84 AU85 AU86 AU87 AU88 AU89 AU90 AU91 AU92 AU93 AU94 AU95 AU96 AU97 AU98 AU99 AU100 AU
light-year1.5812845149626 × 10-5 ly3.1625690299253 × 10-5 ly4.7438535448879 × 10-5 ly6.3251380598506 × 10-5 ly7.9064225748132 × 10-5 ly9.4877070897758 × 10-5 ly0.0001107 ly0.0001265 ly0.0001423 ly0.0001581 ly0.0001739 ly0.0001898 ly0.0002056 ly0.0002214 ly0.0002372 ly0.0002530 ly0.0002688 ly0.0002846 ly0.0003004 ly0.0003163 ly0.0003321 ly0.0003479 ly0.0003637 ly0.0003795 ly0.0003953 ly0.0004111 ly0.0004269 ly0.0004428 ly0.0004586 ly0.0004744 ly0.0004902 ly0.0005060 ly0.0005218 ly0.0005376 ly0.0005534 ly0.0005693 ly0.0005851 ly0.0006009 ly0.0006167 ly0.0006325 ly0.0006483 ly0.0006641 ly0.0006800 ly0.0006958 ly0.0007116 ly0.0007274 ly0.0007432 ly0.0007590 ly0.0007748 ly0.0007906 ly0.0008065 ly0.0008223 ly0.0008381 ly0.0008539 ly0.0008697 ly0.0008855 ly0.0009013 ly0.0009171 ly0.0009330 ly0.0009488 ly0.0009646 ly0.0009804 ly0.0009962 ly0.0010120 ly0.0010278 ly0.0010436 ly0.0010595 ly0.0010753 ly0.0010911 ly0.0011069 ly0.0011227 ly0.0011385 ly0.0011543 ly0.0011702 ly0.0011860 ly0.0012018 ly0.0012176 ly0.0012334 ly0.0012492 ly0.0012650 ly0.0012808 ly0.0012967 ly0.0013125 ly0.0013283 ly0.0013441 ly0.0013599 ly0.0013757 ly0.0013915 ly0.0014073 ly0.0014232 ly0.0014390 ly0.0014548 ly0.0014706 ly0.0014864 ly0.0015022 ly0.0015180 ly0.0015338 ly0.0015497 ly0.0015655 ly0.0015813 ly

The astronomical unit (symbol: au or ua) is a unit of length, roughly the distance from Earth to the Sun. However, that distance varies as Earth orbits the Sun, from a maximum (aphelion) to a minimum (perihelion) and back again once a year. Originally conceived as the average of Earth's aphelion and perihelion, it is now defined as exactly 149 597 870 700 metres (about 150 million kilometres, or 93 million miles). The astronomical unit is used primarily as a convenient yardstick for measuring distances within the Solar System or around other stars. However, it is also a fundamental component in the definition of another unit of astronomical length, the parsec.

Name of unitSymbolDefinitionRelation to SI unitsUnit System
astronomical unitAU

≡ 149 597 870 700 m ≈ Distance from Earth to Sun

≡ 149 597 870 700 m

Science - Astronomy (Length)

conversion table

astronomical unitslight-yearsastronomical unitslight-years
1= 1.5812845149626E-54= 6.3251380598506E-5
1.5= 2.371926772444E-54.5= 7.1157803173319E-5
2= 3.1625690299253E-55= 7.9064225748132E-5
2.5= 3.9532112874066E-55.5= 8.6970648322945E-5
3= 4.7438535448879E-56= 9.4877070897758E-5

The light-year is a unit of length used to express astronomical distances. It is about 9.5 quadrillion metres or 5.9 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.

Name of unitSymbolDefinitionRelation to SI unitsUnit System

≡ Distance light travels in vacuum in 365.25 days

= 9.4607304725808×1015 m

Science - Astronomy (Length)

conversion table

light-yearsastronomical unitslight-yearsastronomical units
1= 63239.7263451124= 252958.90538045
1.5= 94859.5895176684.5= 284578.768553
2= 126479.452690225= 316198.63172556
2.5= 158099.315862785.5= 347818.49489811
3= 189719.179035346= 379438.35807067

Conversion table

astronomical unitslight-years
1= 1.5812845149626 × 10-5
63,239.7263451= 1


exactly equal
approximately equal to
=equal to
digitsindicates that digits repeat infinitely (e.g. 8.294 369 corresponds to 8.294 369 369 369 369 …)