|Unit system||Imperial and US Customary|
|Symbol||ft3 or cu ft|
|1 ft3 in ...||... is equal to ...|
|US Customary|| 1728 in3|
|SI units||0.02831685 m3|
The cubic foot (symbol ft3 or cu ft) 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 L (about 1⁄35 of a cubic metre).
At 60 °F (16 °C), a cubic foot of water weighs 62.37 pounds (28.29 kg).
This section needs additional citations for verification. (December 2019)
|1 cubic foot||= 1728 cubic inches|
|= 1⁄27 of a cubic yard|
|≈ 0.037037 yd3|
|= 0.028316846592 m3|
|= 28.316846592 L|
|= 576⁄77 US fluid gallons|
|≈ 7.4805 US fl gal|
|= 73728⁄77 US fluid ounces|
|≈ 957.5065 US fl oz|
|≈ 6.2288 imperial gallons|
|≈ 996.61 imperial fluid ounces|
|≈ 0.80356 US bushels|
|≈ 0.17811 oil barrel|
Symbols and abbreviations
The IEEE symbol for the cubic foot is ft3. The following abbreviations are used: cubic feet, cubic foot, cubic ft, cu feet, cu foot, cu ft, cu.ft, cuft, cb ft, cb.ft, cbft, cbf, feet3, foot3, ft3, 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., 100 ft3
- Used in the billing of natural gas and water delivered to households.
- MCF: Mille (Latin thousand) cubic feet; i.e., 1000 ft3
- MMCF: Mille mille cubic feet; i.e., 1000000 ft3
- MMCFD: MMCF per day; i.e., 1000000 ft3/d
- Used in the oil and gas industry.
- BCF or TMC: Billion or thousand million cubic feet; i.e., 1000000000 ft3
- TMC is usually used for referring to storage capacity and actual storage volume of storage dams.
- TCF: Trillion cubic feet; i.e., 1000000000000 ft3
- Used in the oil and gas industry.
The IEEE symbol for the cubic foot per second is ft3/s. The following other abbreviations are also sometimes used:
- cu ft/s
- cfs or CFS
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 = 0.028316847 m3⋅s−1 = 28.316847 L⋅s−1 = 1.699 m3⋅min−1 = 1699 L⋅min−1
Cubic foot per minute
The IEEE 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 carburettors, pneumatic tools, and air-compressor systems.
Standard cubic foot
A standard cubic foot (abbreviated scf) is a measure of quantity of gas, sometimes[clarification needed] 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.
- Board foot
- Conversion of units
- Cord (unit)
- Cube (arithmetic), cube root
- Cubic inch
- Cubic yard
- Orders of magnitude (volume) for a comparison with other volumes
- Square foot
- Therm, a unit of natural gas approximately equal to 100 cubic feet
- Cubic metre per second
- ^ a b c d IEEE Standard Letter Symbols for Units of Measurement (SI Customary Inch-Pound Units, and Certain Other Units). ieee.org (Revision of IEEE Std 260.1-1993). IEEE Std 260.1-2004 (2004 ed.). Piscataway, N.J.: IEEE. 2004-09-24. pp. 1–30. doi:10.1109/IEEESTD.2004.94618. ISBN 978-1-5044-0928-5. STD95220 STDPD95220 STDPL95220. Archived from the original (PDF or hardcopy) on 2018-06-12. Retrieved 22 December 2019. , ISBN 978-0-7381-3997-5, ISBN 978-0-7381-3998-2.
- ^ Rowlett, Russ. "Units: C". How Many? A Dictionary of Units of Measurement. University of North Carolina at Chapel Hill. Archived from the original on January 9, 2018. Retrieved August 2, 2020.
- ^ "Carburetor CFM Racing". Summit Racing. Retrieved February 7, 2019.
- ^ "Easy Guide to Rotary Screw Air Compressors for Vehicles". VMACAir.com. October 16, 2018. Retrieved October 30, 2018.