4 meter in feet
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Feet are also commonly used to measure altitude (aviation) as well as elevation (such as that of a mountain). In the US, feet and inches are commonly used to measure height, shorter distances, field length (sometimes in the form of yards), etc. The SI unit for volume is the cubic meter, or m 3.By convention, the volume of a container is typically its capacity, and how much fluid it is able to hold, rather than the amount of space that the actual container displaces. Volume is the quantification of the three-dimensional space a substance occupies. While the United States is one of the few, if not only, countries in which the foot is still widely used, many countries used their own version of the foot prior to metrication, as evidenced by a fairly large list of obsolete feet measurements.Ĭurrent use: The foot is primarily used in the United States, Canada, and the United Kingdom for many everyday applications. Related Surface Area Calculator Area Calculator. This resulted in the measurement of a foot varying between 250 mm and 335 mm in the past compared to the current definition of 304.8 mm. The various lengths were due to parts of the human body historically being used as a basis for units of length (such as the cubit, hand, span, digit, and many others, sometimes referred to as anthropic units). History/origin: Prior to standardization of units of measurement, and the definition of the foot currently in use, the measurement of the foot was used in many different systems including the Greek, Roman, English, Chinese, and French systems, varying in length between each. One foot contains 12 inches, and one yard is comprised of three feet. A foot was defined as exactly 0.3048 meters in 1959. Footĭefinition: A foot (symbol: ft) is a unit of length in the imperial and US customary systems of measurement. The United States is one notable exception in that it largely uses US customary units such as yards, inches, feet, and miles instead of meters in everyday use.
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The current definition of the meter is effectively the same as the definition that was adopted in 1983, with slight modifications due to the change in definition of the second.Ĭurrent use: Being the SI unit of length, the meter is used worldwide in many applications such as measuring distance, height, length, width, etc. In 1960, the meter was again redefined, this time in terms of a certain number of wavelengths of a certain emission line of krypton-86. This changed in 1889, when the International prototype metre was established as the length of a prototype meter bar (made of an alloy of 90% platinum and 10% iridium) measured at the melting point of ice. What is a Foot Foot is an imperial and United States Customary length unit. History/origin: Originally, in 1793, the meter was defined as one ten-millionth of the distance from the equator to the North Pole. To convert meters to feet and inches, please visit meters to feet and inches.
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This definition was slightly modified in 2019 to reflect changes in the definition of the second. The meter is defined as the distance traveled by light in 1/299 792 458 of a second.
#4 meter in feet full#
Symbols, abbreviations, or full names for units of length,Īrea, mass, pressure, and other types.Definition: A meter, or metre (symbol: m), is the base unit of length and distance in the International System of Units (SI). You can find metric conversion tables for SI units, as wellĪs English units, currency, and other data. There are twelve inches in one foot and three feet in one yard.Ĭonversion calculator for all types of measurement units. However, both American and non-American forms of English agree that the spelling "meter" should be used as a suffix in the names of measuring devices such as chronometers and micrometers.Ī foot (plural: feet) is a non-SI unit of distance or length, measuring around a third of a metre. The internationally-accepted spelling of the unit in English is "metre", although the American English spelling meter is a common variant. The metre, symbol: m, is the basic unit of distance (or of "length", in the parlance of the physical sciences) in the International System of Units. You can do the reverse unit conversion fromįeet to meter, or enter any two units below: Enter two units to convert From: