EVERYDAY · ENGINEERING · SCIENCE

km to ly Converter

Convert kilometre (km) to light-year (ly). Enter a value for an instant result, or use the examples and reverse conversion below.

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EVERYDAY

Length

Distance, height, thickness and astronomical length.

km
ly

Try a decimal, 1e-9, 1/3, or 5 1/2.

Result1.057e-13 ly1 km = 1.057e-13 ly
HOW IT IS CALCULATED

Convert through metre

Enter a kilometre value to calculate light-year with full internal precision before display rounding.

Display PrecisionAuto · 6 significant digits

Auto trims unnecessary zeroes and uses scientific notation for extreme magnitudes. Use Digits to set the display precision; calculations retain full precision.

QUICK REFERENCE

All units in this quantity

UnitSymbolConverted value
quectometrefrom kmqm1e33
rontometrefrom kmrm1e30
yoctometrefrom kmym1e27
zeptometrefrom kmzm1e24
attometrefrom kmam1e21
femtometrefrom kmfm1e18
picometrefrom kmpm1e15
nanometrefrom kmnm1000000000000
ångströmfrom kmÅ10000000000000
micrometrefrom kmµm1000000000
millimetrefrom kmmm1000000
centimetrefrom kmcm100000
decimetrefrom kmdm10000
metrefrom kmm1000
decametrefrom kmdam100
hectometrefrom kmhm10
kilometrefrom kmkm1
megametrefrom kmMm0.001
gigametrefrom kmGm0.000001
terametrefrom kmTm0.000000001
petametrefrom kmPm1e-12
exametrefrom kmEm1e-15
zettametrefrom kmZm1e-18
yottametrefrom kmYm1e-21
ronnametrefrom kmRm1e-24
quettametrefrom kmQm1e-27
thou / milfrom kmmil39370100
inchfrom kmin39370.1
footfrom kmft3280.84
yardfrom kmyd1093.61
chainfrom kmch49.7097
furlongfrom kmfur4.97097
international milefrom kmmi0.621371
nautical milefrom kmnmi0.539957
U.S. survey footfrom kmftUS3280.83
typographic pointfrom kmpt2834650
astronomical unitfrom kmau0.00000000668459
light-secondfrom kmls0.00000333564
light-yearfrom kmly1.057e-13
parsecfrom kmpc3.24078e-14

SI symbols follow international notation. U.S. and Imperial measures are labelled separately where their values differ.

km to ly Conversion Reference

Kilometre (km) and light-year (ly) are units of length. Use this page to convert in either direction.

Conversion Examples

Kilometre to Light-year
Kilometre (km)Light-year (ly)
1 km1.057e-13 ly
5 km5.285e-13 ly
10 km1.057e-12 ly
100 km1.057e-11 ly

Examples are rounded to 6 significant digits. The interactive converter retains full calculation precision; change Display Precision to see more digits.

Reverse Conversion

ly to km (light-year to kilometre)

Related Length Conversions

km to qm (kilometre to quectometre)km to rm (kilometre to rontometre)km to ym (kilometre to yoctometre)km to zm (kilometre to zeptometre)km to am (kilometre to attometre)km to fm (kilometre to femtometre)km to pm (kilometre to picometre)km to nm (kilometre to nanometre)km to Å (kilometre to ångström)km to µm (kilometre to micrometre)km to mm (kilometre to millimetre)km to cm (kilometre to centimetre)km to dm (kilometre to decimetre)km to m (kilometre to metre)km to dam (kilometre to decametre)km to hm (kilometre to hectometre)km to Mm (kilometre to megametre)km to Gm (kilometre to gigametre)km to Tm (kilometre to terametre)km to Pm (kilometre to petametre)km to Em (kilometre to exametre)km to Zm (kilometre to zettametre)km to Ym (kilometre to yottametre)km to Rm (kilometre to ronnametre)km to Qm (kilometre to quettametre)km to mil (kilometre to thou / mil)km to in (kilometre to inch)km to ft (kilometre to foot)km to yd (kilometre to yard)km to ch (kilometre to chain)km to fur (kilometre to furlong)km to mi (kilometre to international mile)km to nmi (kilometre to nautical mile)km to ftUS (kilometre to U.S. survey foot)km to pt (kilometre to typographic point)km to au (kilometre to astronomical unit)km to ls (kilometre to light-second)km to pc (kilometre to parsec)

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