English unit is the American name for a unit in one of a number of systems of units of measurement, some obsolete, and some still in use. In spite of the name, it does not necessarily refer to the (non-SI) system of units still in widespread, but mostly unofficial, use in England and the rest of the United Kingdom. The system is known as the English System in the United States and elsewhere as the Imperial System. The American term 'English unit' includes the Imperial units as well as various other U.S. units such as the U.S. gallon (Queen Anne's wine gallon) and the U.S. bushel (Winchester bushel). The former Weights and Measures office in Middlesex, England. ... Look up si, Si, SI in Wiktionary, the free dictionary. ... Motto (French) God and my right Anthem No official anthem - the United Kingdom anthem God Save the Queen is commonly used England() – on the European continent() – in the United Kingdom() Capital (and largest city) London (de facto) Official languages English (de facto)1 Government Constitutional monarchy  -  Monarch Queen Elizabeth II... This article is about post-1824 Imperial units, please see also English unit, U.S. customary unit or Avoirdupois. ...

Various standards under the name 'English units' have applied at different times, in different places and for different things. Prior to the Battle of Hastings in 1066 the Anglo-Saxon system of measurement had been based on the units of the barleycorn and the gyrd (rod). This system presumably had Germanic origins. After the Norman conquest, Roman units were reintroduced. The resultant system of English units was a combination of the Anglo-Saxon and Roman systems. Combatants Normans supported by: Bretons (one third of total), Aquitanians, Flemings Anglo-Saxons Commanders William of Normandy, Odo of Bayeux Harold Godwinson † Strength 7,000-8,000 7,000-8,000 Casualties Unknown, thought to be around 2,000 killed and wounded Unknown, but significantly higher than the Normans The... Bayeux Tapestry depicting events leading to the Battle of Hastings The Norman Conquest of England was the conquest of the Kingdom of England by William the Conqueror (Duke of Normandy), in 1066 at the Battle of Hastings and the subsequent Norman control of England. ... The ancient Roman units of measurement were built on the Greek system with Egyptian influences. ... The famous parade helmet found at Sutton Hoo, probably belonging toRaedwald of East Anglia circa 625. ...

Later development of the English system continued by defining the units by law in the Magna Carta of 1215, and issuing measurement standards from the then capital Winchester. Standards were renewed in 1496, 1588 and 1758. The last Imperial Standard Yard in bronze was made in 1845; it served as the standard in the United Kingdom until the yard was internationally redefined as 0.9144 metre in 1959 (statutory implementation: Weights and Measures Act of 1963). Motto (French) God and my right Anthem No official anthem - the United Kingdom anthem God Save the Queen is commonly used England() – on the European continent() – in the United Kingdom() Capital (and largest city) London (de facto) Official languages English (de facto)1 Government Constitutional monarchy  -  Monarch Queen Elizabeth II... Magna Carta Magna Carta (Latin for Great Charter, literally Great Paper), also called Magna Carta Libertatum (Great Charter of Freedoms), is an English charter originally issued in 1215. ... Winchester is a historic city in southern England, with a population of around 40,000 within a 3 mile radius of its centre. ...

The use of English units spread throughout the British Isles and to the British colonies. These units form the basis for the Imperial system formerly used in Commonwealth countries and the customary system used in the United States. Whilst these two systems are quite similar there are a number of notable differences between the Imperial and U.S. systems. This article needs additional references or sources for verification. ... U.S. customary units, also known in the United States as English units[1] (but see English unit) or standard units, are units of measurement that are currently used in the USA, in some cases alongside units from SI (the International System of Units — the modern metric system). ... Both the Imperial and U.S. customary derive from earlier English systems. ...

Usage of the term "English System" or "English Unit" is common in the US, but it is problematical. It can be ambiguous. It usually refers to either the Imperial System or the US Customary System, and in cases where these two systems differ, it is not clear which system is being described. Some people also call it the "British system" in the US. It is interesting to note, referring to this system as the British or English system, almost only occurs in the United States, mainly causeing confusion in Britain when reading from American sources.

Historical English units

Length

poppyseed 

¼ of a barleycorn

barleycorn 

Basic Anglo-Saxon unit, the length of a corn of barley. The unit survived after 1066, redefined as 1/3 inch. Note the relation to the grain unit of weight.

digit 

¾ inch

Chart showing the relationships of distance measures.

finger 

7/8 inch

hand 

4 inches

ynch, inch 

Anglo Saxon inch, 3 barleycorns. Based on the Roman uncia from 1066.

nail 

3 digits = 2¼ inches = 1/16 yard

palm 

3 inches

shaftment 

Width of the hand and outstretched thumb, 6½ ynches before 1066, 6 inches thereafter

span 

Width of the outstretched hand, from the tip of the thumb to the tip of the little finger, 3 palms = 9 inches

foot 

Usually 13 inches but also other variants. Shortened to 12 inches by basing it on the Roman pes from 1066.

cubit 

Forearm, 18 inches.

yard 

Introduced after 1066, 3 feet = 36 inches.

ell 

Elbow, 20 nails = 1¼ yard or 45 inches. Mostly for measuring clothing

fathom 

From one fingertip to the other, 6 feet

rod 

Saxon gyrd measuring stick, might have been from 20 "natural feet". Retained its length but redefined as 16 ½ Roman feet after 1066.

chain 

four linear rods. Named after the length of surveyor's chain used to measure distances until quite recently. Any of several actual chains used for land surveying and divided in links. Gunter's chain, introduced in the 17th century, is 66 feet.

furlong 

"One plough's furrow long" (Saxon furrow is furh), the distance a plough team could be driven without rest. This varied from region to region depending on soil type and local habit. In modern context, it is deemed to be 660 feet, 40 rods or ten chains.

mile 

Introduced after 1066, originally the Roman mile at 5000 feet, in 1592 it was extended to 5280 feet to make it an even number of furlongs, i.e. 8.

league 

Usually three miles. Intended to be an hour's walk.

Genera See text A poppy is an annual, biennial, or perennial plant of the Family Papaveraceae, typically with showy flowers borne one per stem, native mainly to the Northern hemisphere and often grown for ornament, opium or food. ... Barleycorn may mean: a grain of barley unit of length equal to 1/3 (see Medieval weights and measures) John Barleycorn, an ancient folksong This is a disambiguation page — a navigational aid which lists other pages that might otherwise share the same title. ... A digit (lat. ... Image File history File links Size of this preview: 427 × 599 pixelsFull resolution (604 × 848 pixel, file size: 68 KB, MIME type: image/jpeg) Created by Futurehawk 2007 I, the copyright holder of this work, hereby release it into the public domain. ... Image File history File links Size of this preview: 427 × 599 pixelsFull resolution (604 × 848 pixel, file size: 68 KB, MIME type: image/jpeg) Created by Futurehawk 2007 I, the copyright holder of this work, hereby release it into the public domain. ... A finger (sometimes finger-breadth), when used as a unit, is usually seven eighth of an inch or 2. ... A hand (or handbreadth) is a unit of length measurement, usually based on the breadth of a male human hand and thus around 1 dm, i. ... An inch (plural: inches; symbol or abbreviation: in or, sometimes, ″ - a double prime) is the name of a unit of length in a number of different systems, including English units, Imperial units, and United States customary units. ... A nail, when used as a unit, is usually one sixteenth of a certain base unit. ... Three archaic hand units of measurment: 1: Palm * 2: Span 3: Hand * In English, a Palm is commonly used to represent four fingers held together. ... A shaftment, when used as a unit of length, is usually six inches or two palms, i. ... Three archaic hand units of measurment: * 1: Palm¹ * 2: Span, Shaftment * 3: Hand ¹ In English, a Palm is commonly used to represent four fingers held together. ... This article is about a foot as a unit of length. ... Cubit is the name for any one of many units of measure used by various ancient peoples. ... A yard (abbreviation: yd) is the name of a unit of length in a number of different systems, including English units, Imperial units, and United States customary units. ... An ell, when used as a unit of length, is usually 45 inches, i. ... A fathom is the name of a unit of length in the Imperial system (and the derived U.S. customary units). ... A rod is a unit of length, equal to 5. ... As a unit of measurement within the Imperial system, the chain (surveyors chain, Gunters chain) is defined as 22 yards, 66 feet, or four rods. ... Edmund Gunter (1581 - December 10, 1626), English mathematician, of Welsh extraction, was born in Hertfordshire in 1581. ... A furlong is a measure of distance within imperial units and U.S. customary units, and is equal to 660 feet or one-eighth of a mile. ... A mile is a unit of length, usually used to measure distance, in a number of different systems, including Imperial units, United States customary units and Norwegian/Swedish mil. ... A furlong is a measure of distance within imperial units and U.S. customary units, and is equal to 660 feet or one-eighth of a mile. ... League is a unit of distance long common in Europe and Latin America, although no longer an official unit in any nation. ... A mile is a unit of length, usually used to measure distance, in a number of different systems, including Imperial units, United States customary units and Norwegian/Swedish mil. ...

Area

perch

one rod, when referring to length; one square rod when referring to area; one rod by one foot by a foot and a half when referring to volume (usually specifically for masonry stonework)

acre

area of land one chain (four rods) in width by one furlong in length. As the traditional furlong could vary in length from country to country, so did the acre. In England an acre was 4,840 square yards, in Scotland 6,150 square yards and in Ireland 7,840 square yards. It is a Saxon unit, meaning field. Probably meant to be "as much area as could be plowed in one day".

rood

one quarter of an acre, confusingly sometimes called an acre itself in many ancient contexts. One furlong in length by one rod in width, or 40 square rods.

carucate

an area equal to that which can be ploughed by one eight-oxen team in a single year (also called a plough or carve). Approximately 120 roods.

bovate

the amount of land one ox can plough in a single year (also called an oxgate). Approximately 15 roods or one eighth of a carucate.

virgate

the amount of land a pair of oxen can plough in a single year. Approximately 30 roods (also called yard land).

An acre is the name of a unit of area in a number of different systems, including Imperial units and United States customary units. ... Several native system of weights and measures were used in Scotland. ... A rood is an old English ( Anglo-Saxon) unit equal to quarter an acre, i. ... The carucate was both a unit of assessment and a peasant landholding unit found in most of the Danelaw counties. ... A bovate was a measure of land which could be ploughed in one year by one eighth of a plough team with eight oxen, or in other words the measure of land representing one eighth of a carucate. ... The virgate was a unit of land area measure in Medieval England. ...

Administrative units

hide

four to eight bovates. A unit of yield, rather than area, it measured the amount of land able to support a single household for agricultural and taxation purposes.

knight's fee

five hides. A knight's fee was expected to produce one fully equipped soldier for a knight's retinue in times of war.

hundred

or wapentake - 100 hides grouped for administrative purposes.

The hide was a variable unit of land area used in medieval England, defined according to its arable yield and taxable potential rather than its exact dimensions. ... The household is the basic unit of analysis in many microeconomic and government models. ... Knights fee is a feudal term used in medieval England to describe the value of land. ... The silver Anglia knight, commissioned as a trophy in 1850, intended to represent the Black Prince. ... A hundred is an administrative division, frequently used in Europe and New England, which historically was used to divide a larger region into smaller geographical units. ... A wapentake is a term derived from the Old Norse, the rough equivalent of an Anglo-Saxon hundred. ...

Volume

General

This article may require cleanup to meet Wikipedia's quality standards. Please discuss this issue on the talk page or replace this tag with a more specific message. This article has been tagged since September 2006.

In both Britain and America, in addition to perch as a measure of length, there is also the perch which refers to the volume measurement of stone; one perch is equal to 16.5 ft × 1.5 ft × 1 ft = 24.75 cu. ft. of dry stone. The relationship to the unit of length (one perch = 16.5 feet) should be obvious. Image File history File links Broom_icon. ... A pole (more commonly called a perch or a rod) is a unit of length, equal to 5. ... Perch is an antique unit of measure used in stonework, based on the pole or rod. ... It has been suggested that Thousand Cubic Feet be merged into this article or section. ...

Units of volume included:

Mouthful

about ½ Ounce

Jigger

Mouthful × 2

Jack or Jackpot

Jigger × 2

Jill or Gill

Jack × 2

Cup

Jill × 2

Pint 

Cup × 2 (and a "Pint's a pound the world around" or in Britain, "A pint of pure water weighs a pound and a quarter")

Chart showing the relationships of volume measures.

Quart

Pint × 2

Pottle or Half Gallon

Quart × 2

Gallon

Pottle × 2

Peck

Gallon × 2

Kenning

Peck × 2

Bushel

Kenning × 2

Cask, Strike, or Coomb

Bushel × 2

Barrel

Cask × 2

Hogshead 

Barrel × 2

Butt or Pipe

hogshead × 2

Tun 

Butt × 2 (A tun is a ton)

A Tun would actually be about 2,048 lb. but is a pretty close estimate given that you could derive the weight and volume all from mouthfuls of water. A jigger (pen included for scale) A jigger or measure is a bartending tool used to measure liquor, which is typically then poured into a cocktail shaker. ... Look up Jack, jack in Wiktionary, the free dictionary. ... Jackpot is: A former British comic. ... Jill may refer to Jill Valentine, a Resident Evil character Jill, a feminine given name Jill, a novel by Philip Larkin Jill, a pet dog of Betty Spaghetty Jill, the term for a female ferret Jill of the Jungle, a computer game Jill Kelly, a pornographic actress Jill, one half... For other uses, see Gill (disambiguation). ... ... The pint is a unit of volume or capacity. ... Image File history File links No higher resolution available. ... Image File history File links No higher resolution available. ... A quart is a unit of measurement for volume. ... The gallon (abbreviation: gal) is a unit of volume. ... A 1/2 peck apple bag A peck is an Imperial and U.S. customary unit of dry volume, equivalent in each of these systems to 8 dry quarts, or 16 dry pints. ... In literature, a kenning is a compound poetic phrase, a figure of speech, substituted for the usual name of a person or thing. ... A bushel is a unit of volume, used (with somewhat different definitions) in the systems of Imperial units and U.S. customary units. ... Coomb may refer to: Coomb, a rare Celtic Brythonic survival word; meaning a small deep dry valley, easily defended. ... The barrel is the name of several units of volume: Oil barrel: 42 U.S. gallons, 158. ... The butt (from the medieval French and Italian ) or pipe is an old English unit of wine casks, holding about 477 litres or rather two hogsheads. ... The butt (from the medieval French and Italian botte) or pipe is an old English unit of wine casks, holding about 477 litres or rather two hogsheads. ... The tun is an old English unit of wine cask volume, holding about 954 litres, almost a cubic metre. ...

Wine

A glass of red wine This article is about the alcoholic beverage. ... The gallon (abbreviation: gal) is a unit of volume. ... The rundlet is an old English unit of wine casks, holding about 68 litres. ... The barrel is the name of several units of volume: Oil barrel: 42 U.S. gallons, 158. ... The tierce is an old English unit of wine casks, holding about 159 litres. ... A hogshead is a large cask of liquid (less often, of a food commodity). ... A Firkin is an old English unit of volume. ... The puncheon, in the United States also called pon for brevity, is an old English unit of wine casks, holding about 318 litres. ... The puncheon, in the United States also called pon for brevity, is an old English unit of wine casks, holding about 318 litres. ... The butt (from the medieval French and Italian botte) or pipe is an old English unit of wine casks, holding about 477 litres or rather two hogsheads. ... The butt (from the medieval French and Italian ) or pipe is an old English unit of wine casks, holding about 477 litres or rather two hogsheads. ... The tun is an old English unit of wine cask volume, holding about 954 litres, almost a cubic metre. ... The U.S. customary units (more commonly known in the US as English units or standard units) are the non-metric units of measurement that are presently used in the United States, in some cases alongside the metric system of units. ... The Imperial units or the Imperial system is a collection of English units, first defined in the Weights and Measures Act of 1824, later refined (until 1959) and reduced. ...

Brewery

A pint of ale Ale is a beer style brewed from barley malt with a top fermenting brewers yeast that ferments quickly, giving a sweet, full body and a fruity, and sometimes a butter-like, taste. ... Leffe, a Belgian beer, served in branded glasses Schlenkerla Rauchbier straight from the cask Beer brewed from wheat. ... The gallon (abbreviation: gal) is a unit of volume. ... A Firkin is an old English unit of volume. ... The kilderkin is an old English unit of brewery casks, holding about 82 litres. ... The barrel is the name of several units of volume: Oil barrel: 42 U.S. gallons, 158. ... A hogshead is a large cask of liquid (less often, of a food commodity). ... The butt (from the medieval French and Italian ) or pipe is an old English unit of wine casks, holding about 477 litres or rather two hogsheads. ... The tun is an old English unit of wine cask volume, holding about 954 litres, almost a cubic metre. ... // Events A high-powered conspiracy of notables, the Immortal Seven, invite William and Mary to depose James II of England. ... 1803 was a common year starting on Saturday (see link for calendar). ... The Imperial units or the Imperial system is a collection of English units, first defined in the Weights and Measures Act of 1824, later refined (until 1959) and reduced. ... 1824 was a leap year starting on Thursday (see link for calendar). ...

Weight

The Avoirdupois, Troy and Apothecary systems of weights all shared the same finest unit, the grain, however they differ as to the number of grains there are in a dram, ounce and pound. Originally, this grain was the weight of a grain seed from the middle of an ear of barley. There also was a smaller wheat grain, said to be ¾ (barley) grains or about 48.6 milligrams. The avoirdupois (IPA: ; French:) system is a system of weights (or, properly, mass) based on a pound of sixteen ounces. ... Troy weight is a system of units of mass customarily used for precious metals, black powder, and gemstones. ... The apothecaries system of mass is an obsolete system formerly used by apothecaries (now called pharmacists or chemists) in English-speaking countries. ... A grain is a unit of mass equal to 0. ... The pound (abbreviations: lb or, sometimes in the United States, #) is a unit of mass (called weight in everyday parlance) in a number of different systems, including English units, Imperial units, and United States customary units. ... Binomial name L. Barley (Hordeum vulgare) is an annual cereal grain, which serves as a major animal feed crop, with smaller amounts used for malting and in health food. ...

Avoirdupois

grain (gr) 

64.79891 mg, 1/7000th of a pound

dram/drachm (dr) 

27.34375 gr (sixteenth of an ounce) (possibly originated as the weight of silver in ancient Greek coin drachma)

Chart showing the relationships of weight measures.

ounce (oz) 

16 dr = 437.5 grains ≈ 28 g

pound (lb) 

16 oz = 7000 grains ≈ 454 g (NB: 'lb' stands for libra)

quarter 

¼ cwt

hundredweight (cwt) 

112 lb (long) or 100 lb (short)

ton 

20 cwt

Additions: A grain is a unit of mass equal to 0. ... Dram can mean several things: Dram (unit), an imperial unit of volume Dram, an imperial unit of weight or mass, see avoirdupois and apothecaries system Ottoman dram, a unit of weight, see dirhem Armenian dram, a monetary unit DRAM, a type of RAM Category: ... Drachma, pl. ... Image File history File links No higher resolution available. ... Image File history File links No higher resolution available. ... The ounce (abbreviation: oz) is the name of a unit of mass in a number of different systems, including various systems of mass that form part of English units, Imperial units, and United States customary units. ... The pound (abbreviations: lb or, sometimes in the United States, #) is a unit of mass (called weight in everyday parlance) in a number of different systems, including English units, Imperial units, and United States customary units. ... Hundred weight or hundredweight is a unit of measurement for mass in both the system of measurement used in the United Kingdom (and previously throughout the British Commonwealth), and in the system used in the United States. ... Look up ton in Wiktionary, the free dictionary. ...

nail 

1/16 cwt = 7 lb

clove 

7 lb (wool)

stone (st) 

2 cloves = 14 lb (an Anglo-Saxon unit changed to fit in)

tod 

2 st = ¼ cwt (long)

Bold text A nail, when used as a unit, is usually one sixteenth of a certain base unit. ... Binomial name (L.) Merrill & Perry A single dried clove flower bud Cloves (Syzygium aromaticum, syn. ... The stone is a unit of mass in the Imperial system of weights and measures used in the United Kingdom, Ireland, and most Commonwealth countries. ...

Block quote

Block quoteThe Metric System is much better.

Troy and Tower

The Troy and Tower pounds and their subdivisions were used for coins and precious metals. The Tower pound, which is based upon an earlier Anglo-Saxon pound, was abolished in 1527.

In terms of (silver) currency a pound was 20 shillings of 12 pennies each (i.e. 240) from the late 8th century (Charlemagne/Offa of Mercia) to 1971 in Great Britain, but lighter than a troy one. Most old European currencies, like mark, shilling/solidus/groschen/øre, penny/pfennig/denar, taler/dollar/krone, florin/gulden/guilder/pound/złoty also belong into this monetary system. “GBP” redirects here. ... (7th century — 8th century — 9th century — other centuries) Events The Iberian peninsula is taken by Arab and Berber Muslims, thus ending the Visigothic rule, and starting almost 8 centuries of Muslim presence there. ... Charlemagne and Pippin the Hunchback. ... Offa (died July 26/29, 796) was the King of Mercia from 757 until his death. ... The word mark (from an apparently non-Teutonic word found in all Teutonic and Romance languages, and Latinized as marca or marcus) originally expressed a measure of weight only for gold and silver, commonly used throughout western Europe and equivalent to 8 oz (ounces). ... Before decimalisation in 1971, a shilling had a value of 12d (old pence), and was equal to 1/20th of a pound: there were 240 (old) pence to the pound. ...

Troy

grain (gr) 

≈ 65 mg

pennyweight (dwt) 

24 gr ≈ 1.56 g

ounce (oz t) 

20 dwt = 480 gr ≈ 31.1 g

pound (lb t) 

12 oz t = 5760 gr ≈ 373 g

mark

8 oz t

A grain is a unit of mass equal to 0. ... A pennyweight (symbol dwt) is an obsolete unit of mass which is the same as 24 grains, 1/240th of a troy pound, 1/20th of a troy ounce, or approximately 1. ... The ounce (abbreviation: oz) is the name of a unit of mass in a number of different systems, including various systems of mass that form part of English units, Imperial units, and United States customary units. ... The pound (abbreviations: lb or, sometimes in the United States, #) is a unit of mass (called weight in everyday parlance) in a number of different systems, including English units, Imperial units, and United States customary units. ... The mark was originally a unit of weight for gold and silver common throughout western Europe, and was equal to 8 troy ounces. ...

Tower

tower ounce 

18¾ dwt = 450 gr ≈ 29 g

tower pound 

12 oz T = 225 dwt = 5400 gr ≈ 350 g

The pound (abbreviations: lb or, sometimes in the United States, #) is a unit of mass (called weight in everyday parlance) in a number of different systems, including English units, Imperial units, and United States customary units. ...

Apothecary

grain (gr) 

≈ 65 mg

scruple (s ap) 

20 gr

dram (dr ap) 

3 s ap = 60 gr

ounce (oz ap) 

8 dr ap = 480 gr

pound (lb ap) 

5760 gr = 1 lb t

A grain is a unit of mass equal to 0. ... The apothecaries system of mass is an obsolete system formerly used by apothecaries (now called pharmacists or chemists) in English-speaking countries. ... Dram can mean several things: Dram (unit), an imperial unit of volume Dram, an imperial unit of weight or mass, see avoirdupois and apothecaries system Ottoman dram, a unit of weight, see dirhem Armenian dram, a monetary unit DRAM, a type of RAM Category: ... The ounce (abbreviation: oz) is the name of a unit of mass in a number of different systems, including various systems of mass that form part of English units, Imperial units, and United States customary units. ... The pound (abbreviations: lb or, sometimes in the United States, #) is a unit of mass (called weight in everyday parlance) in a number of different systems, including English units, Imperial units, and United States customary units. ...

Others

Merchants/Mercantile pound 

15 oz tower = 6750 gr ≈ 437.4 g

London/Mercantile pound 

15 oz troy = 16 oz tower = 7200 gr ≈ 466.6 g

Mercantile stone 

12 lb L ≈ 5.6 kg

Tron pound (Edinburgh/Scots) 

16 oz Tron ≈ 623.5 g

Butcher's stone 

8 lb ≈ 3.63 kg

Sack 

26 st = 364 lb ≈ 165 kg

The carat was once specified as four grains in the English-speaking world. Some local units in the English dominion were (re-)defined in simple terms of English units, such as the Indian tola of 180 grains. The carat is a unit of mass used for gems, and equals 200 milligrams or 3. ... For Tola, a judge of ancient Israel, see Tola A tola is a traditional Indian unit of mass, now standardised as 0. ...

See also: slug and poundal. The slug is an English unit of mass. ... The poundal is a non-SI unit of force. ...

See also

• Feudalism
• Domesday Book
• Weights and measures
• History of measurement
• Systems of measurement
• Obsolete Scottish units of measurement
• Imperial unit
• United States customary units
• Comparison of the Imperial and US customary systems
• Plan for Establishing Uniformity in the Coinage, Weights, and Measures of the United States
• Approximate conversion of units
• Metrication
• Metric system
• SI

Roland pledges his fealty to Charlemagne; from a manuscript of a chanson de geste. ... A line drawing entitled Domesday Book from Andrew Williamss Historic Byways and Highways of Old England. ... Weights and measures is a term used by legal authorities in English speaking countries such as the United Kingdom for a function related to units of measurement in trade. ... Units of measurement were among the earliest tools invented by humans. ... A system of measurement is a set of units which can be used to specify anything which can be measured. ... Several native system of weights and measures were used in Scotland. ... The Imperial units or the Imperial system is a collection of English units, first defined in the Weights and Measures Act of 1824, later refined (until 1959) and reduced. ... U.S. customary units, also known in the United States as English units[1] (but see English unit) or standard units, are units of measurement that are currently used in the USA, in some cases alongside units from SI (the International System of Units — the modern metric system). ... Both the Imperial and U.S. customary derive from earlier English systems. ... The Plan for Establishing Uniformity in the Coinage, Weights, and Measures of the United States was a report submitted to the U.S. House of Representatives on July 13, 1790 by Secretary of State Thomas Jefferson. ... Approximate conversion of units often needs to be done without calculator or computer. ... Metrication or metrification refers to the introduction of the SI metric system as the international standard for physical measurements—a long-term series of independent and systematic conversions from the various separate local systems of weights and measures. ... The International System of Units (symbol: SI) (for the French phrase Syst me International dUnit s) is the most widely used system of units. ... Look up si, Si, SI in Wiktionary, the free dictionary. ...

External links

• English Customary Weights and Measures
• Jacques J. Proot's Anglo-Saxon weights & measures page.
• Alexander Justice, "A General Discourse of the Weights and Measures" (London, 1707).