Category

Imperial units

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The mile, sometimes the international mile or statute mile to distinguish it from other miles, is a British imperial unit and United States customary unit of length; both are based on the older English unit of length equal to 5,280 English feet, or 1,760 yards. The statute mile was standardised as a unit of length between the Commonwealth of Nations and the United States by an international agreement in 1959, when the yard was formally redefined with respect to SI units as 0.9144metres, making the mile exactly (). For everyday use, five miles equates roughly to eight kilometres. Mileage is the

The inch (symbol: in or prime (symbol)|) is a unit of length in the British Imperial and the United States customary systems of measurement. It is equal to yard or of a foot. Derived from the Roman uncia ("twelfth"), the word inch is also sometimes used to translate similar units in other measurement systems, usually understood as deriving from the width of the human thumb.

degree Fahrenheit

The Fahrenheit scale () is a temperature scale based on one proposed in 1724 by the physicist Daniel Gabriel Fahrenheit (1686–1736). It uses the degree Fahrenheit (symbol: °F) as the unit. Several accounts of how he originally defined his scale exist, but the original paper suggests the lower defining point, 0 °F, was established as the freezing temperature of a solution of brine made from a mixture of water, ice, and ammonium chloride (a salt). The other limit established was his best estimate of the average human body temperature, originally set at 90 °F, then 96 °F (about 2.6

The acre ( ) is a unit of land area used in the British imperial and the United States customary systems. It is traditionally defined as the area of one chain by one furlong (66 by 660 feet), which is exactly equal to 10 square chains, of a square mile, 4,840 square yards, or 43,560 square feet, and approximately 4,047 m2, or about 40% of a hectare. The acre is sometimes abbreviated ac, but is usually spelled out as the word "acre".

unit of mass in imperial, US customary, and avoirdupois systems of units

angle unit; π/180 radians

thumb|The informal public imperial units|imperial measurement standards erected at the [[Royal Observatory, Greenwich, in the 19th century: 1 British yard, 2 feet, 1 foot, 6 inches, and 3 inches. The inexact monument was designed to permit rods of the correct measure to fit snugly into its pins at an ambient temperature of 62 °F (16.66 °C).]] thumb|Bronze Yard No.11, the official standard of length for the United States between 1855 and 1892, when the Treasury Department formally adopted a metric standard. Bronze Yard No.11 was forged to be an exact copy of the British Imperial Stan

metric horsepower

Horsepower (hp) is a unit of measurement of power, or the rate at which work is done, usually in reference to the output of engines or motors. There are many different standards and types of horsepower. Two common definitions used today are the imperial horsepower, abbreviated hp or bhp, which is about , and the metric horsepower, also represented as cv or PS, which is approximately . The electric horsepower, hpE, is exactly , while the boiler horsepower is 9809.5 or 9811 watts, depending on the exact year.

The ounce () is any of several different units of mass, weight, or volume and is derived almost unchanged from the , an Ancient Roman unit of measurement.

The gallon is a unit of volume in British imperial units and United States customary units.

unit of volume with different values

The pint (, ; symbol pt, sometimes abbreviated as p) is a unit of volume or capacity in both the imperial and United States customary measurement systems. In both of those systems, it is one-eighth of a gallon.

300px|thumb|A full bushel is represented by a basket in the lower right.

twenty-foot equivalent unit

unit of cargo capacity, TEU

A furlong is a measure of distance in imperial units and United States customary units equal to one-eighth of a mile, equivalent to any of 660 feet, 220 yards, 40 rods or perches, 10 chains, or approximately 201 metres. It is now mostly confined to use in horse racing, where in many countries it is the standard measurement of race lengths, and agriculture, where it is used to measure rural field lengths and distances specifically in the United Kingdom, Ireland, Canada, and the United States.

imperial system of units

system of units first defined in the British Weights and Measures Act of 1824, which was later refined and reduced

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British thermal unit (thermochemical)

outdated unit of energy, about 1054.3503 J

pound per square inch

unit of pressure or stress

unit of mass used in many Commonwealth countries

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drinking vessel

Imperial and US customary measurement systems

English (pre 1824), Imperial (post 1824) and US Customary (post 1776) units of measure

informal unit of measure equal to 14 pounds avoirdupois

imperial unit and U.S. customary unit of area

The quart (symbol: qt) is a unit of volume equal to a quarter of a gallon. Three kinds of quarts are currently used: the liquid quart and dry quart of the US customary system and the of the British imperial system. All are roughly equal to one liter. It is divided into two pints or (in the US) four cups. Historically, the size of a quart has varied with the different values of gallons over time, and in the case of the dry quart, in reference to different commodities.

The hundredweight (abbreviation: cwt), formerly also known as the centum weight or quintal, is a British imperial and United States customary unit of weight or mass. Its value differs between the United States customary and British imperial systems. The two values are distinguished in American English as the short and long hundredweight and in British English as the cental and imperial hundredweight.

thumb|upright=1.2|Finely crafted pan balance or scales with boxed set of standardized gram weights sequenced in units of mass.Avoirdupois (; abbreviated avdp.) is a measurement system of weights that uses pounds and ounces as units. It was first commonly used in the 13th century AD and was updated in 1959.

thousandth of an inch

small unit of length in the imperial and US customary systems

set of units of volume

unit of force: the force exerted by one standard gravity on a one-pound mass

A ton is any of several units of measure of mass, volume or force. It has a long history and has acquired several meanings and uses.

unit of mass or volume in different systems

unit of volume with different values

thumb|upright=1.4|A hogshead in relation to other barrels A hogshead (abbreviated "hhd", plural "hhds") is a large cask of liquid (or, less often, of a food commercial product) for manufacturing and sale. It refers to a specified volume, measured in either imperial or US customary measures, primarily applied to alcoholic beverages, such as wine, ale, or cider.

Imperial and US customary (non-metric) unit of volume

flat-bottomed drinking glass

unit of volume with different values

Imperial / U.S. customary unit of volume

thumb|upright|A half-peck apple bag

imperial / U.S. customary (non-SI non-metric) unit of volume

The poundal (symbol: pdl) is a unit of force, introduced in 1877, that is part of the Absolute English system of units, which itself is a coherent subsystem of the foot–pound–second system.

English unit of length or area

set of units of volume

thumb|Irish gold pistole, bearing its weight (4 dwt 7 gr) ([[National Museum of Ireland – Decorative Arts and History)]] A pennyweight (dwt) is a unit of mass equal to 24 grains, of a troy ounce, of a troy pound, avoirdupois ounce and exactly 1.55517384 grams. It is abbreviated dwt, d standing for denarius (an ancient Roman coin), and later used as the symbol of an old British penny (see £sd).

A foot-candle (sometimes foot candle; abbreviated fc, lm/ft2, or sometimes ft-c) is a non-SI unit of illuminance or light intensity. The foot-candle is defined as one lumen per square foot. This unit is commonly used in lighting layouts in parts of the world where United States customary units are used, mainly the United States. Nearly all of the world uses the corresponding SI derived unit lux, defined as one lumen per square meter.