th - Thou. 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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1This is a conversion chart for thou (British Imperial Measure before 1963). 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.
2Enter the value you want to convert (thou). Then click the Convert Me button.
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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:

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

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  • Significant figures:
  • Digit groups separator:
Your value (thou, th):
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Metric

thou to kilometer (km)
thou to meter (m)
thou to decimeter (dm)
thou to centimeter (cm)
thou to millimeter (mm)
thou to micrometre (micron)
thou to nanometer (nm)
thou 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.

thou to league
thou to mile (mi)
thou to land
thou to furlong
thou to bolt
thou to chain
thou to pole
thou to rod (rd)
thou to perch
thou to yard (yd)
thou to feet and inches (x'y")
thou to span
thou to hand
thou to inch (in)
thou to line
thou to mil
thou 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.
thou to league
thou to mile (mi)
thou to land
thou to skein
thou to bolt
thou to shackle
thou to furlong
thou to chain
thou to rope
thou to pole
thou to goad
thou to ell
thou to yard (yd)
thou to pace
thou to cubit (cu)
thou to foot (ft)
thou to span (sp)
thou to nail
thou to shaftment
thou to hand (hd)
thou to palm (plm)
thou to inch (in)
thou to finger
thou to digit
thou to barleycorn
thou to poppyseed
thou to line
thou to button
thou to caliber
thou to mil
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  /  / mil
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US Surveyors' Measure

thou to furlong
thou to Ramsden's (engineers') chain (ch)
thou to Gunter's (surveyors') chain (ch)
thou to Gurley's chain (ch)
thou to Gunter's (surveyors') pole
thou to Gunter's (surveyors') yard
thou 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.
thou to nautical league (naut.leag)
thou to nautical mile (naut.mi)
thou to cable length (cbl)
thou 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.
thou to US nautical mile
thou 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.
thou to Admiralty mile
thou 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.
thou to cuadra of Argentina
thou to cuadra of Bolivia
thou to cuadra of Chile
thou to cuadra of Colombia
thou to cuadra of Ecuador
thou to cuadra of Nicaragua
thou to cuadra of Paraguay
thou to cuadra of Uruguay
thou to vara of Argentina
thou to vara of Brazil
thou to vara of Chile
thou to vara of Colombia
thou to vara of Costa Rica
thou to vara of Cuba
thou to vara of Dominican Republic
thou to vara of Ecuador
thou to vara of El Salvador
thou to vara of Guatemala
thou to vara of Honduras
thou to vara of Mexico
thou to vara of Nicaragua
thou to vara of Panama
thou to vara of Paraguay
thou to vara of Peru (peruana)
thou to vara of Peru (española)
thou to vara of Uruguay
thou to vara of São Tomé and Principe
thou 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

thou to ri (里)
thou to cho (町)
thou to jo (丈)
thou to hiro (尋)
thou to ken (間)
thou to shaku (尺)
thou to sun (寸)
thou to bu (分)
thou to rin (厘)
thou 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

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

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

thou to cek (尺)
thou to tsun (寸)
thou 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.
thou to yot (โยชน์, league)
thou to sen (เส้น, rope)
thou to wa (วา, fathom)
thou to sok (ศอก, cubit)
thou to khuep (คืบ, span)
thou to nio (นิ้ว, finger)
thou 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

thou to dioptre (diopter)
Units: dioptre (diopter)
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Geographical (German)

thou 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.
thou to rack unit (U)
thou to horizontal pitch (HP)
Units: rack unit (U)  / horizontal pitch (HP)
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Typographical (British and U.S. - ATA system)

thou to pica
thou to pica [PostScript]
thou to point (pt)
thou to point [PostScript] (pt)
thou to pixel (px)
thou to twip
Units: pica  / pica [PostScript]  / point (pt)  / point [PostScript] (pt)  / pixel (px)  / twip
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Typographical (Europe - Didot system)

thou to cicero
thou to point (pt)
Units: cicero  / point (pt)
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European footwear unit

thou to Paris point
Units: Paris point
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Astronomical

thou to red shift (z)
thou to parsec (pc)
thou to light year
thou to astronomical unit (au)
thou to light minute
thou to light second
Units: red shift (z)  / parsec (pc)  / light year  / 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.
thou to light microsecond
thou to light nanosecond
thou 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.
thou to Planck length (L)
Units: Planck length (L)

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