Standard cubic foot

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A standard cubic foot (scf) is a unit representing the amount of gas (such as natural gas) contained in a volume of one cubic foot at reference temperature and pressure conditions. It is the unit commonly used when following the customary system, a collection of standards set by the National Institute of Standards and Technology. Another unit used for the same purpose is the standard cubic metre (Sm³), derived from SI units, representing the amount of gas contained in a volume of one cubic meter at different reference conditions.^[1] The reference conditions depend on the type of gas and differ from other standard temperature and pressure conditions.