Square foot

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Comparison of 1 square foot with some Imperial and metric units of area Comparison land area units.svg
Comparison of 1 square foot with some Imperial and metric units of area

The square foot (plural square feet; abbreviated sq. ft, sf, ft2) is an imperial unit and U.S. customary unit (non-SI, non-metric) of area, used mainly in the United States and partially in Bangladesh, Canada, Ghana, Hong Kong, India, Malaysia, Nepal, Pakistan, Singapore and the United Kingdom.[ citation needed ] It is defined as the area of a square with sides of 1 foot.

Metric system decimal system of units of measurement

The metric system is an internationally recognised decimalised system of measurement. It is in widespread use, and where it is adopted, it is the only or most common system of weights and measures. It is now known as the International System of Units (SI). It is used to measure everyday things such as the mass of a sack of flour, the height of a person, the speed of a car, and the volume of fuel in its tank. It is also used in science, industry and trade.

Area quantity that expresses the extent of a two-dimensional surface or shape, or planar lamina, in the plane

Area is the quantity that expresses the extent of a two-dimensional figure or shape, or planar lamina, in the plane. Surface area is its analog on the two-dimensional surface of a three-dimensional object. Area can be understood as the amount of material with a given thickness that would be necessary to fashion a model of the shape, or the amount of paint necessary to cover the surface with a single coat. It is the two-dimensional analog of the length of a curve or the volume of a solid.


Although the pluralisation is regular in the noun form, when used as an adjective, the singular is preferred. So, a flat measuring 700 square feet could be described as a 700 square-foot flat. This corresponds to common linguistic usage of foot.


1 square foot is equivalent to:

A square inch is a unit of area, equal to the area of a square with sides of one inch. The following symbols are used to denote square inches:

Square yard unit of area

The square yard is an imperial unit of area, formerly used in most of the English-speaking world but now generally replaced by the square metre, however it is still in widespread use in the U.S., Canada, the U.K. and India. It is defined as the area of a square with sides of one yard in length.

1 acre is equivalent to 43,560 square feet.

See also

Conversion of units is the conversion between different units of measurement for the same quantity, typically through multiplicative conversion factors.

The cubic foot is an imperial and US customary (non-metric) unit of volume, used in the United States, and partially in Canada, and the United Kingdom. It is defined as the volume of a cube with sides of one foot (0.3048 m) in length. Its volume is 28.3168 liters or about ​135 of a cubic meter.

Metrication in Canada

Metrication in Canada began in 1970 and while Canada has converted to the metric system for many purposes, there is still significant use of non-metric units and standards in many sectors of the Canadian economy. This is mainly due to historical ties with the United Kingdom, the traditional use of the imperial system of measurement in Canada, proximity to the United States, and to public opposition to metrication during the transition period.

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Acre unit of area

The acre is a unit of land area used in the imperial and US customary systems. It is traditionally defined as the area of one chain by one furlong, which is exactly equal to 10 square chains, ​1640 of a square mile, or 43,560 square feet, and approximately 4,047 m2, or about 40% of a hectare. Based upon the International yard and pound agreement of 1959, an acre may be declared as exactly 4,046.8564224 square metres. The acre is a statute measure in the United States and was formerly one in the United Kingdom and almost all countries of the former British Empire, although informal use continues.

Furlong A unit of length equal to 220 yards still used widley in horse racing

A furlong is a measure of distance in imperial units and U.S. customary units equal to one eighth of a mile, equivalent to 660 feet, 220 yards, 40 rods, or 10 chains.

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

The system of imperial units or the imperial system is the system of units first defined in the British Weights and Measures Act of 1824, which was later refined and reduced. The Imperial units replaced the Winchester Standards, which were in effect from 1588 to 1825. The system came into official use across the British Empire. By the late 20th century, most nations of the former empire had officially adopted the metric system as their main system of measurement, although some imperial units are still used in the United Kingdom, Canada and other countries formerly part of the British Empire. The imperial system developed from what were first known as English units, as did the related system of United States customary units.

United States customary units are a system of measurements commonly used in the United States. The United States customary system developed from English units which were in use in the British Empire before the U.S. became an independent country. However, the United Kingdom's system of measures was overhauled in 1824 to create the imperial system, changing the definitions of some units. Therefore, while many U.S. units are essentially similar to their Imperial counterparts, there are significant differences between the systems.

A cubic yard is an Imperial / U.S. customary unit of volume, used in the United States, Canada, and the UK. It is defined as the volume of a cube with sides of 1 yard in length.

The foot pound-force is a unit of work or energy in the Engineering and Gravitational Systems in United States customary and imperial units of measure. It is the energy transferred upon applying a force of one pound-force (lbf) through a linear displacement of one foot. The corresponding SI unit is the joule.

The stremma is a Greek unit of land area now equal to precisely 1,000 square meters. Its area can be visualized as equal to the area enclosed by a square having side length of 31.62 meters, or 103.7 imperial feet. It is also known as the royal stremma to distinguish it from earlier forms of the unit.

Union Square (Hong Kong) commercial and residential real estate project in Hong Kong

Union Square is a commercial and residential real estate project in Hong Kong on the West Kowloon reclamation. Covering 13.54 hectares, the site has a gross floor area of 1,090,026 square metres (11,732,940 sq ft), approximately the size of the Canary Wharf development in London. As of 2011, the site contained some of the tallest buildings in Hong Kong — including the tallest commercial building in Hong Kong, the 118-story International Commerce Centre and the loftiest residential tower in Hong Kong, The Cullinan.

The bigha is a traditional unit of measurement of area of a land, commonly used in Nepal, Bangladesh and in a number of states of India, including Uttarakhand, Haryana, Himachal Pradesh, Punjab, Madhya Pradesh, Uttar Pradesh, Bihar, Jharkhand, West Bengal, Assam, Gujarat and Rajasthan but not in southern states of India. There is no "standard" size of bigha. The size of a bigha varies considerably from place to place. The size of Bigha is different in different areas.

Cord (unit) unit of volume

The cord is a unit of measure of dry volume used to measure firewood and pulpwood in the United States and Canada.

Paddington Waterside human settlement in United Kingdom

The Paddington Waterside Partnership is the body coordinating regeneration of the Paddington Special Policy Area around Paddington Station in London. The project covers an area almost the size of Soho, creating about 10,000,000 square feet (930,000 m2) of space between 1998 and 2018.

A kattha is a unit of area mostly used for measuring land parts of in Eastern India, Nepal, and Bangladesh. A kattha is roughly one twentieth part of a bigha.

A scale ruler is a tool for measuring distances and transferring measurements at a fixed ratio of length; two common examples are an architect's scale and engineer's scale.

Lake Silver

Lake Silver (銀湖·天峰), formerly known as Lake W (銀峰·湖泊) is a private housing estate developed by MTR Corporation and Sino Land. It is located in Ma On Shan, Hong Kong between Wu Kai Sha Station and Monte Vista, another housing development. The whole project covers an area of 370,000 square feet (34,000 m2), and was completed in 2009. Lake Silver comprises a shopping centre with flats above.

39 Conduit Road residential property in Hong Kong

39 Conduit Road is a residential property situated in Conduit Road in western mid-Levels of Hong Kong. It is a prestige development by Henderson Land Development.

Express Avenue

Express Avenue is a shopping mall in Chennai promoted by Express Infrastructure, A division of Express Newspapers Pvt. Ltd. It is home to the largest gaming arcade in South India. Built at a cost of 7,500 million (US$100 million), the 1,750,000-square-foot (163,000 m2) mall has 10 anchor tenants and 150 vanilla tenants.