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30.48 cm. 304.8 mm. The foot ( pl. feet; standard symbol: ft) [1] [2] is a unit of length in the British imperial and United States customary systems of measurement. The prime symbol, ′, is commonly used to represent the foot. [3] In both customary and imperial units, one foot comprises 12 inches, and one yard comprises three feet.
Conversion of units is the conversion of the unit of measurement in which a quantity is expressed, typically through a multiplicative conversion factor that changes the unit without changing the quantity. This is also often loosely taken to include replacement of a quantity with a corresponding quantity that describes the same physical property.
The most common feet in English are the iamb, trochee, dactyl, and anapaest. The foot might be compared to a bar, or a beat divided into pulse groups, in musical notation. The English word "foot" is a translation of the Latin term pes, plural pedes, which in turn is a translation of the Ancient Greek πούς, pl. πόδες.
The centimetre ( SI symbol: cm) is a unit of length in the metric system equal to 10−2 metres ( 1 100 m = 0.01 m ). To help compare different orders of magnitude, this section lists lengths between 10 −2 m and 10 −1 m (1 cm and 1 dm). 1 cm – 10 millimetres. 1 cm – 0.39 inches. 1 cm – edge of a square of area 1 cm 2.
Metrication in the United States is the process of introducing the International System of Units, also known as the metric system, to measure physical quantities in the U.S. Although the U.S. has officially adopted the metric system since 1866, the use of customary units derived from the imperial system is still widespread. Learn more about the history, challenges and benefits of metrication ...
Metric equivalents are approximate, converted at 1 pes = 296 mm. Other units of area described by Columella in his De Re Rustica include the porca of 180 × 30 Roman feet (about 473 m 2 or 5,090 sq ft) used in Hispania Baetica and the Gallic candetum or cadetum of 100 feet [ clarification needed ] in the city or 150 in the country.
A system of units of measurement, also known as a system of units or system of measurement, is a collection of units of measurement and rules relating them to each other. Systems of measurement have historically been important, regulated and defined for the purposes of science and commerce. Instances in use include the International System of ...
Imperial/U.S. The basic unit of length in the imperial and U.S. customary systems is the yard, defined as exactly 0.9144 m by international treaty in 1959. [2] [5] Common imperial units and U.S. customary units of length include: [6] thou or mil ( 1⁄1000 of an inch) inch ( 25.4 mm) foot (12 inches, 0.3048 m) yard (3 feet, 0.9144 m)