Light Year Conversions
A light-year is the distance light travels in a vacuum in one Julian year (365.25 days): about 9.46 trillion km. The nearest star system, Alpha Centauri, is about 4.37 light-years away.
1 ly = 9.460730473 × 10¹⁵ m
Convert light years to other units
Each line shows how much 1 light year (ly) equals. Select a conversion for a calculator, formula and table.
Metric (SI)
- Light Year to Meter9.46073 × 10¹⁵ m
- Light Year to Kilometer9,460,730,000,000 km
- Light Year to Hectometer94,607,300,000,000 hm
- Light Year to Dekameter946,073,000,000,000 dam
- Light Year to Decimeter9.46073 × 10¹⁶ dm
- Light Year to Centimeter9.46073 × 10¹⁷ cm
- Light Year to Millimeter9.46073 × 10¹⁸ mm
- Light Year to Micrometer9.46073 × 10²¹ µm
- Light Year to Micron9.46073 × 10²¹ µ
- Light Year to Nanometer9.46073 × 10²⁴ nm
- Light Year to Angstrom9.46073 × 10²⁵ Å
- Light Year to Picometer9.46073 × 10²⁷ pm
- Light Year to Femtometer9.46073 × 10³⁰ fm
- Light Year to Fermi9.46073 × 10³⁰ fm
- Light Year to Attometer9.46073 × 10³³ am
- Light Year to Megameter9,460,730,000 Mm
- Light Year to Gigameter9,460,730 Gm
- Light Year to Terameter9,460.73 Tm
- Light Year to Petameter9.46073 Pm
- Light Year to Exameter0.00946073 Em
Imperial & US customary
- Light Year to Inch3.7247 × 10¹⁷ in
- Light Year to Foot3.10391 × 10¹⁶ ft
- Light Year to Yard1.03464 × 10¹⁶ yd
- Light Year to Mile5,878,630,000,000 mi
- Light Year to Kiloyard10,346,400,000,000 kyd
- Light Year to Furlong47,029,000,000,000 fur
- Light Year to Chain470,290,000,000,000 ch
- Light Year to Rope1.55196 × 10¹⁵ rope
- Light Year to Rod1.88116 × 10¹⁵ rd
- Light Year to Perch1.88116 × 10¹⁵ perch
- Light Year to Pole1.88116 × 10¹⁵ pole
- Light Year to Fathom5.17319 × 10¹⁵ ftm
- Light Year to Link4.7029 × 10¹⁶ li
- Light Year to Hand9.31174 × 10¹⁶ h
- Light Year to Mil3.7247 × 10²⁰ mil
- Light Year to Microinch3.7247 × 10²³ µin
US survey units
- Light Year to Foot (US Survey)3.10391 × 10¹⁶ ft (US)
- Light Year to Inch (US Survey)3.72469 × 10¹⁷ in (US)
- Light Year to Mile (US Survey)5,878,610,000,000 mi (US)
- Light Year to Mile (Statute)5,878,610,000,000 mi
- Light Year to League (Statute)1,959,540,000,000 lea
- Light Year to Furlong (US Survey)47,028,900,000,000 fur (US)
- Light Year to Chain (US Survey)470,289,000,000,000 ch (US)
- Light Year to Rod (US Survey)1.88116 × 10¹⁵ rd (US)
- Light Year to Link (US Survey)4.70289 × 10¹⁶ li (US)
- Light Year to Fathom (US Survey)5.17318 × 10¹⁵ ftm (US)
Nautical
- Light Year to Nautical Mile (international)5,108,390,000,000 NM
- Light Year to Nautical Mile (UK)5,105,120,000,000 NM (UK)
- Light Year to Nautical League (int.)1,702,800,000,000 NL
- Light Year to Nautical League (UK)1,701,710,000,000 NL (UK)
Astronomical
- Light Year to Astronomical Unit63,241.1 au
- Light Year to Parsec0.306601 pc
- Light Year to Kiloparsec0.000306601 kpc
- Light Year to Megaparsec3.06601 × 10⁻⁷ Mpc
Atomic & physics
- Light Year to A.u. of Length1.78782 × 10²⁶ a₀
- Light Year to X-unit9.44109 × 10²⁸ xu
Historical & cloth
- Light Year to Ell8.2771 × 10¹⁵ ell
- Light Year to Cubit (UK)2.06928 × 10¹⁶ cubit
- Light Year to Span (cloth)4.13855 × 10¹⁶ span
- Light Year to Finger (cloth)8.2771 × 10¹⁶ finger
- Light Year to Nail (cloth)1.65542 × 10¹⁷ nail
- Light Year to Barleycorn1.11741 × 10¹⁸ barleycorn
- Light Year to League1,959,540,000,000 lea
- Light Year to Arpent161,662,000,000,000 arpent
- Light Year to Mile (Roman)6,393,230,000,000 m.p.
Typography
- Light Year to Pica2.23482 × 10¹⁸ pc
- Light Year to Point2.68178 × 10¹⁹ pt
- Light Year to Twip5.36356 × 10²⁰ twip
Convert other units to light years
- Meter to Light Year
- Kilometer to Light Year
- Hectometer to Light Year
- Dekameter to Light Year
- Decimeter to Light Year
- Centimeter to Light Year
- Millimeter to Light Year
- Micrometer to Light Year
- Micron to Light Year
- Nanometer to Light Year
- Angstrom to Light Year
- Picometer to Light Year
- Femtometer to Light Year
- Fermi to Light Year
- Attometer to Light Year
- Megameter to Light Year
- Gigameter to Light Year
- Terameter to Light Year
- Petameter to Light Year
- Exameter to Light Year
- Inch to Light Year
- Foot to Light Year
- Yard to Light Year
- Mile to Light Year
- Kiloyard to Light Year
- Furlong to Light Year
- Chain to Light Year
- Rope to Light Year
- Rod to Light Year
- Perch to Light Year
- Pole to Light Year
- Fathom to Light Year
- Ell to Light Year
- Link to Light Year
- Cubit (UK) to Light Year
- Hand to Light Year
- Span (cloth) to Light Year
- Finger (cloth) to Light Year
- Nail (cloth) to Light Year
- Barleycorn to Light Year
- Mil to Light Year
- Microinch to Light Year
- League to Light Year
- Arpent to Light Year
- Foot (US Survey) to Light Year
- Inch (US Survey) to Light Year
- Mile (US Survey) to Light Year
- Mile (Statute) to Light Year
- League (Statute) to Light Year
- Furlong (US Survey) to Light Year
- Chain (US Survey) to Light Year
- Rod (US Survey) to Light Year
- Link (US Survey) to Light Year
- Fathom (US Survey) to Light Year
- Nautical Mile (international) to Light Year
- Nautical Mile (UK) to Light Year
- Nautical League (int.) to Light Year
- Nautical League (UK) to Light Year
- Mile (Roman) to Light Year
- Astronomical Unit to Light Year
- Parsec to Light Year
- Kiloparsec to Light Year
- Megaparsec to Light Year
- A.u. of Length to Light Year
- X-unit to Light Year
- Pica to Light Year
- Point to Light Year
- Twip to Light Year