The cubic foot (symbol ft³ or cu ft)
, . is an Imperial unit, imperial 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 A cube or regular hexahedron is a three-dimensional space, three-dimensional solid object in geometry, which is bounded by six congruent square (geometry), square faces, a type of polyhedron. It has twelve congruent edges and eight vertices. It i ...

with sides of one

foot The foot (: feet) is an anatomical structure found in many vertebrates. It is the terminal portion of a limb which bears weight and allows locomotion. In many animals with feet, the foot is an organ at the terminal part of the leg made up o ...

() in

length Length is a measure of distance. In the International System of Quantities, length is a quantity with Dimension (physical quantity), dimension distance. In most systems of measurement a Base unit (measurement), base unit for length is chosen, ...

, or exactly , which is very close to of a cubic metre).

Conversions

Symbols and abbreviations

The

IEEE The Institute of Electrical and Electronics Engineers (IEEE) is an American 501(c)(3) organization, 501(c)(3) public charity professional organization for electrical engineering, electronics engineering, and other related disciplines. The IEEE ...

symbol for the cubic foot is ft³. 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: * CCF or HCF: ''Centum'' (Latin hundred) cubic feet; i.e., ** Used in the billing of

natural gas Natural gas (also fossil gas, methane gas, and gas) is a naturally occurring compound of gaseous hydrocarbons, primarily methane (95%), small amounts of higher alkanes, and traces of carbon dioxide and nitrogen, hydrogen sulfide and helium ...

and water delivered to households. * MCF: ''Mille'' (Latin thousand) cubic feet; i.e., * MMCF: Mille mille (= million) cubic feet; i.e., * MMCFD: MMCF per day; i.e., /d ** Used in the oil and gas industry. * BCF or TMC: Billion or thousand million cubic feet; i.e., ** TMC is usually used for referring to storage capacity and actual storage volume of storage dams. * TCF: Trillion cubic feet; i.e., ** Used in the oil and gas industry.

Cubic foot per second and related flow rates

The

symbol for the cubic foot per second is ft³/s. The following other abbreviations are also sometimes used: * ft³/sec * cu ft/s * cfs or CFS * cusec * 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

symbol for the cubic foot per minute is ft³/min. The following abbreviations are used: * cu ft/min * * cfm or CFM * 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 Standard temperature and pressure (STP) or standard conditions for temperature and pressure are various standard sets of conditions for experimental measurements used to allow comparisons to be made between different sets of data. The most used ...

as a cubic foot of volume at and of

pressure Pressure (symbol: ''p'' or ''P'') is the force applied perpendicular to the surface of an object per unit area over which that force is distributed. Gauge pressure (also spelled ''gage'' pressure)The preferred spelling varies by country and eve ...

References