Cubic foot

The cubic foot is an 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 with sides of one foot (0.3048 m) in length. Its volume is 28.3168 litres or about ¹⁄₃₅ of a cubic metre.

A cubic foot of water weighs 62 pounds (28 kg).

Conversions

Symbols

There is no universally agreed abbreviations but the following are used:

• cubic feet, cubic foot, cubic ft, cu ft, cuft, cu.ft, cb ft, cbft, cb.ft, cbf, cu feet, cu foot, ft³, feet³, foot³, feet/-3, foot/-3, ft/-3  ft
• CCF for 100 cubic feet (C denotes centum, hundred. Also HCF where H stands for hundred. Used in the billing of natural gas and water delivered to households.)
• MCF for 1000 cubic feet (M denotes mil, thousand)
• MCF for 1000000 cubic feet (28000 m³)
• MCF for millions of cubic feet per day.^[1]
• MCF for a billion cubic feet^[2]
• MCF for a trillion cubic feet.^[1][2]
• MCF for thousand million cubic feet (usually used for referring to storage capacity and actual storage volume of storage dams)

Cubic foot per second

There is no universally agreed symbol but the following are used.

• ft³/s
• cu ft/s
• cfs
• ft^3/sec
• ft³/sec
• cusec

Cubic foot per minute

There is no universally agreed symbol but the following are used.

• ft³/min
• CFPM
• CFM

Standard cubic foot

A standard cubic foot (abbreviated scf) is a measure of quantity of gas, sometimes but not always defined in terms of standard temperature and pressure as a cubic foot of volume at 60 degrees Fahrenheit (15.56 °C; 288.71 K) and 14.7 pounds per square inch (PSI) (1.01 bar; 101.35 kPa) of pressure.

See also

Notes

1. 1 2 Used in the oil and gas industry.
2. 1 2 The terms billion and trillion as used here refer to the short scale definitions, 10⁹ and 10¹² respectively.