The cubic foot (symbol ft3 or cu ft)[ [1], , .] is an Imperial unit and US customary (non-metric) unit of volume, used in the United States and the United Kingdom. It is defined as the volume of a cube with sides of one foot () in length, or exactly , which is very close to of a cubic metre).
Conversions
1 cubic foot | ≡ 1728 |
≡ of a cubic yard |
≡ |
≡ US |
≡ US |
≈ |
≈ |
≡ US |
≈ |
≡ oil barrel |
Symbols and abbreviations
The IEEE symbol for the cubic foot is ft
3. The following abbreviations are used: cubicfeet, cubicfoot, cubicft, cufeet, cufoot, cuft, cu.ft, cuft, cbft, cb.ft, cbft, cbf, feet, foot, ft, feet/-3, foot/-3, ft/-3.
Larger multiples are in common usage in commerce and industry in the United States:
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CCF or HCF: (Latin hundred) cubic feet; i.e.,
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Used in the billing of natural gas and water delivered to households.
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MCF: (Latin thousand) cubic feet; i.e.,
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MMCF: Mille mille (= million) cubic feet; i.e.,
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MMCFD: MMCF per day; i.e., /d
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BCF or TMC: Billion or thousand million cubic feet; i.e.,
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Tmcft is usually used for referring to storage capacity and actual storage volume of storage dams.
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TCF: Trillion cubic feet; i.e.,
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Used in the oil and gas industry.
Cubic foot per second and related flow rates
The IEEE symbol for the cubic foot per second is ft
3/s. The following other abbreviations are also sometimes used:
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ft3/sec
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cu ft/s
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cfs or CFS
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cusec
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second-feet
The flow or discharge of rivers, i.e., the volume of water passing a location per unit of time, is commonly expressed in units of cubic feet per second or cubic metres per second.
Cusec is a unit of flow rate, used mostly in the United States in the context of water flow, particularly of rivers and canals.
Conversions: 1 ft3s−1 = = = =
Cubic foot per minute
The IEEE symbol for the cubic foot per minute is ft
3/min. The following abbreviations are used:
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cu ft/min
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cfm or CFM
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cfpm or CFPM
Cubic feet per minute is used to measure the amount of air that is being delivered, and is a common metric used for carburetors, pneumatic tools, and air-compressor systems.
Standard cubic foot
A standard cubic foot (abbreviated scf) is a measure of quantity of gas, sometimes defined in terms of standard temperature and pressure as a cubic foot of volume at and of
pressure.
See also
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Board foot
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Conversion of units
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Cord (unit)
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Cube (arithmetic), cube root
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Cubic inch
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Cubic yard
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Orders of magnitude (volume) for a comparison with other volumes
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Orders of magnitude (one cubic millimetre to one cubic metre)
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Square foot
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Therm, a unit of natural gas approximately equal to 100 cubic feet
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Cubic metre per second