Light Year. Conversion Chart / Distance and Length Converter, Astronomical

Light Year. Conversion Chart

This converter features contemporary units of length. There is also a special converter for historical units of length you might want to visit for ancient, medieval and other old units that are no longer used.

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1	This is a conversion chart for light year (Astronomical). To switch the unit simply find the one you want on the page and click it. You can also go to the universal conversion page.
2	Enter the value you want to convert (light year). Then click the Convert Me button. Your value gets instantly converted to all other units on the page.
3	Now find the unit you want and get the conversion result next to it. It's your answer.
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Conversion settings explained

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Number of significat figures

Do you want rounded off figures or scientifically precise ones? For everyday conversions we recommend choosing 3 or 4 significant digits. If you want maximum precision, set the number to 9

Digit groups separator

Choose how you want to have your digit groups separated in long numbers:

1234567.89	none
1 234 567.89	space
1,234,567.89	comma
1.234.567,89	point

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Significant figures:
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Metric

light year to kilometer (km)
light year to meter (m)
light year to decimeter (dm)
light year to centimeter (cm)
light year to millimeter (mm)
light year to micrometre (micron)
light year to nanometer (nm)
light year to ångström

Units: kilometer (km) / meter (m) / decimeter (dm) / centimeter (cm) / millimeter (mm) / micrometre (micron) / nanometer (nm) / ångström

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The American System (US Customary Units) and British Imperial Measures

American weights and measures are based on units used in Britain prior to 1826, when imperial system was officially established. Until 1960-1963 American and British units of length were different in 2 parts per million. In the middle of 20th century it started causing problems and the governments of the two countries agreed to refine the measures to exactly match. Since then Great Britain and the United States were using the same measures of length. In the U.S. the old standard of foot was retained with the name US survey foot.

From 1995 the UK adopted metric units for general use. The only imperial measures of length that can be officially used now are miles, yards, feet and inches for road traffic signs.

light year to league
light year to mile (mi)
light year to land
light year to furlong
light year to bolt
light year to chain
light year to pole
light year to rod (rd)
light year to perch
light year to yard (yd)
light year to foot (ft)
light year to feet and inches (x'y")
light year to span
light year to hand
light year to inch (in)
light year to line
light year to mil
light year to microinch

Units: league / mile (mi) / land / furlong / bolt / chain / pole / rod (rd) / perch / yard (yd) / foot (ft) / feet and inches (x'y") / span / hand / inch (in) / line / mil / microinch

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British Imperial Measure before 1963

The first English official measurement standards were defined in 15th century. British system of units, known as imperial units, was established in 1824. The British Weights and Meausurements Act of 1824 repealed all existing British measures legislation and redefined existing units. The 1963 Weights and Measures Act standartized the international measures.

Units: league / mile (mi) / land / skein / bolt / shackle / furlong / chain / rope / pole / goad / ell / yard (yd) / pace / cubit (cu) / foot (ft) / span (sp) / nail / shaftment / hand (hd) / palm (plm) / inch (in) / finger / digit / barleycorn / poppyseed / line / button / caliber / thou (th) / mil

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US Surveyors' Measure

light year to furlong
light year to Ramsden's (engineers') chain (ch)
light year to Gunter's (surveyors') chain (ch)
light year to Gurley's chain (ch)
light year to Gunter's (surveyors') pole
light year to Gunter's (surveyors') yard
light year to Ramsden's (engineers') link
light year to Gunter's (surveyors') link
light year to Gurley's link
light year to Gunter's (surveyors') foot (ft)

Units: furlong / Ramsden's (engineers') chain (ch) / Gunter's (surveyors') chain (ch) / Gurley's chain (ch) / Gunter's (surveyors') pole / Gunter's (surveyors') yard / Ramsden's (engineers') link / Gunter's (surveyors') link / Gurley's link / Gunter's (surveyors') foot (ft)

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International Nautical Measure

The international nautical mile was defined by the First International Extraordinary Hydrographic Conference, Monaco in 1929. This is the only definition in widespread current use, and is the one accepted by the International Bureau of Weights and Measures. Before 1929 different countries had different definitions, and the Soviet Union, the United Kingdom and the United States did not immediately accept the international value.

light year to nautical league (naut.leag)
light year to nautical mile (naut.mi)
light year to cable length (cbl)
light year to fathom (fath)

Units: nautical league (naut.leag) / nautical mile (naut.mi) / cable length (cbl) / fathom (fath)

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US Nautical Measure

These measures were abandoned in favor of the international nautical measures in 1954.

light year to US nautical mile
light year to US cable length
light year to US fathom (fath)

Units: US nautical mile / US cable length / US fathom (fath)

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British (Imperial) Nautical Measure

These measures were abandoned in favor of the international nautical measures in 1970.

light year to Admiralty mile
light year to Admiralty cable length

Units: Admiralty mile / Admiralty cable length

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Spanish Customary Units Still In Use Today

These units are still actively used in some countries of Latin America. Their values vary from country to country. You can find more old Spanish customary units on our historical lengths page.

light year to cuadra of Argentina
light year to cuadra of Bolivia
light year to cuadra of Chile
light year to cuadra of Colombia
light year to cuadra of Ecuador
light year to cuadra of Nicaragua
light year to cuadra of Paraguay
light year to cuadra of Uruguay
light year to vara of Argentina
light year to vara of Brazil
light year to vara of Chile
light year to vara of Colombia
light year to vara of Costa Rica
light year to vara of Cuba
light year to vara of Dominican Republic
light year to vara of Ecuador
light year to vara of El Salvador
light year to vara of Guatemala
light year to vara of Honduras
light year to vara of Mexico
light year to vara of Nicaragua
light year to vara of Panama
light year to vara of Paraguay
light year to vara of Peru (peruana)
light year to vara of Peru (española)
light year to vara of Uruguay
light year to vara of São Tomé and Principe
light year to vara of Venezuela

Units: cuadra of Argentina / cuadra of Bolivia / cuadra of Chile / cuadra of Colombia / cuadra of Ecuador / cuadra of Nicaragua / cuadra of Paraguay / cuadra of Uruguay / vara of Argentina / vara of Brazil / vara of Chile / vara of Colombia / vara of Costa Rica / vara of Cuba / vara of Dominican Republic / vara of Ecuador / vara of El Salvador / vara of Guatemala / vara of Honduras / vara of Mexico / vara of Nicaragua / vara of Panama / vara of Paraguay / vara of Peru (peruana) / vara of Peru (española) / vara of Uruguay / vara of São Tomé and Principe / vara of Venezuela

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Japanese

light year to ri (里)
light year to cho (町)
light year to jo (丈)
light year to hiro (尋)
light year to ken (間)
light year to shaku (尺)
light year to sun (寸)
light year to bu (分)
light year to rin (厘)
light year to mo (毛, 毫)

Units: ri (里) / cho (町) / jo (丈) / hiro (尋) / ken (間) / shaku (尺) / sun (寸) / bu (分) / rin (厘) / mo (毛, 毫)

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Chinese units of 1930

light year to li (市里)
light year to yin (引)
light year to zhang (市丈)
light year to chi (市尺)
light year to cun (市寸)
light year to fen (市分)
light year to li (釐 or 厘)
light year to hao (毫)
light year to si (丝)
light year to hu (忽)

Units: li (市里) / yin (引) / zhang (市丈) / chi (市尺) / cun (市寸) / fen (市分) / li (釐 or 厘) / hao (毫) / si (丝) / hu (忽)

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Chinese units of 1915

light year to li (里)
light year to yin (引)
light year to zhang (丈)
light year to bu (步)
light year to chi (尺)
light year to cun (寸)
light year to fen (分)
light year to li (釐 or 厘)
light year to hao (毫)
light year to si (丝)
light year to hu (忽)

Units: li (里) / yin (引) / zhang (丈) / bu (步) / chi (尺) / cun (寸) / fen (分) / li (釐 or 厘) / hao (毫) / si (丝) / hu (忽)

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Hong Kong units

light year to cek (尺)
light year to tsun (寸)
light year to fan (分)

Units: cek (尺) / tsun (寸) / fan (分)

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Thai units

Some of these units are still in use even though metric system was formally established in 1923. Before the metrication the old units were standartied to exact metric values.

light year to yot (โยชน์, league)
light year to sen (เส้น, rope)
light year to wa (วา, fathom)
light year to sok (ศอก, cubit)
light year to khuep (คืบ, span)
light year to nio (นิ้ว, finger)
light year to krabiat (กระเบียด, quarter of a finger)

Units: yot (โยชน์, league) / sen (เส้น, rope) / wa (วา, fathom) / sok (ศอก, cubit) / khuep (คืบ, span) / nio (นิ้ว, finger) / krabiat (กระเบียด, quarter of a finger)

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Optical

light year to dioptre (diopter)

Units: dioptre (diopter)

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Geographical (German)

light year to geographical mile

Units: geographical mile

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Computer Equipment

A rack unit, U or RU is a unit of measure that describes the height of equipment designed to mount in a 19-inch rack or a 23-inch rack. The 19-inch (482.6 mm) or 23-inch (584.2 mm) dimension refers to the width of the equipment mounting frame in the rack including the frame; the width of the equipment that can be mounted inside the rack is less.

light year to rack unit (U)
light year to horizontal pitch (HP)

Units: rack unit (U) / horizontal pitch (HP)

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Typographical (British and U.S. - ATA system)

light year to pica
light year to pica [PostScript]
light year to point (pt)
light year to point [PostScript] (pt)
light year to pixel (px)
light year to twip

Units: pica / pica [PostScript] / point (pt) / point [PostScript] (pt) / pixel (px) / twip

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Typographical (Europe - Didot system)

light year to cicero
light year to point (pt)

Units: cicero / point (pt)

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European footwear unit

light year to Paris point

Units: Paris point

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Astronomical

light year to red shift (z)
light year to parsec (pc)
light year to astronomical unit (au)
light year to light minute
light year to light second

Units: red shift (z) / parsec (pc) / / astronomical unit (au) / light minute / light second

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Grace Hopper's units of distance

Grace Hopper is famous for her nanoseconds visual aid. People used to ask her why satellite communication took so long. She started handing out pieces of wire that were just under one foot long (11.80 inches) — the distance that light travels in one nanosecond. She also passed out packets of pepper, calling the individual grains of ground pepper picoseconds. She also used these aids to illustrate why computers had to be small to be fast.

light year to light microsecond
light year to light nanosecond
light year to light picosecond

Units: light microsecond / light nanosecond / light picosecond

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Natural units

In physics, natural units are physical units of measurement based only on universal physical constants. The origin of their definition comes only from properties of nature and not from any human construct.

light year to Planck length (L)

Units: Planck length (L)

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light year to league
light year to mile (mi)
light year to land
light year to skein
light year to bolt
light year to shackle
light year to furlong
light year to chain
light year to rope
light year to pole
light year to goad
light year to ell
light year to yard (yd)
light year to pace
light year to cubit (cu)
light year to foot (ft)
light year to span (sp)
light year to nail
light year to shaftment
light year to hand (hd)
light year to palm (plm)
light year to inch (in)
light year to finger
light year to digit
light year to barleycorn
light year to poppyseed
light year to line
light year to button
light year to caliber
light year to thou (th)
light year to mil

Light Year. Measurements Converter