cubic foot | |
---|---|

Unit system | Imperial and US Customary |

Unit of | Volume |

Symbol | ft^{3} or cu ft |

Conversions | |

1 ft^{3} in ... | ... is equal to ... |

US Customary | 1728 in^{3} ^{1}⁄_{27} yd^{3} |

SI units | 0.02831685 m^{3} |

The **cubic foot** (symbol **ft ^{3}**)

^{[1]}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).

## Conversions

This section needs additional citations for verification. (December 2019) (Learn how and when to remove this template message) |

1 cubic foot | = 1728 cubic inches | |

= ^{1}⁄_{27} of a cubic yard
| ||

≈ 0.037037 yd^{3} | ||

= 0.0283 m^{3}
| ||

= 28.3168 L | ||

= ^{576}⁄_{77} US fluid gallons
| ||

= ^{1728}⁄_{231} US fl gal
| ||

≈ 7.480519 US fl gal | ||

= ^{73728}⁄_{77} US fluid ounces
| ||

≈ 957.51 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 ft^{3}.^{[1]} 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, feet^{3}, foot^{3}, ft^{3}, feet/-3, foot/-3, ft/-3.^{[citation needed]}

Larger multiples are in common usage in commerce and industry in the USA:

- CCF or HCF:
*Centum*(Latin hundred) cubic feet; i.e., 100 ft^{3}- Used in the billing of natural gas and water delivered to households.

- MCF:
*Mille*(Latin thousand) cubic feet; i.e., 1000 ft^{3} - MMCF: Mille mille cubic feet; i.e., 1000000 ft
^{3} - MMCFD: MMCF per day; i.e., 1000000 ft
^{3}/d- Used in the oil and gas industry.

- BCF or TMC: Billion or thousand million cubic feet; i.e., 1000000000 ft
^{3}- TMC is usually used for referring to storage capacity and actual storage volume of storage dams.

- TCF: Trillion cubic feet; i.e, 1000000000000 ft
^{3}- Used in the oil and gas industry.

The IEEE symbol for the cubic foot per second is ft^{3}/s.^{[1]} The following other abbreviations are also sometimes used:

- ft
^{3}/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,^{[2]} used mostly in the United States in the context of water flow, particularly of rivers and canals.

Conversions: 1 ft^{3}s^{−1} = 0.028316847 m^{3}⋅s^{−1} = 28.316847 L⋅s^{−1} = 1.699 m^{3}⋅min^{−1} = 1699 L⋅min^{−1}

## Cubic foot per minute

The IEEE symbol for the cubic foot per minute is ft^{3}/min.^{[1]} The following abbreviations are used:

- cu ft/min
- cufm
- 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,^{[3]} pneumatic tools, and air-compressor systems.^{[4]}

## 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.^{[citation needed]}

## See also

- 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

## References

- ^
^{a}^{b}^{c}^{d}*IEEE Standard Letter Symbols for Units of Measurement (SI Customary Inch-Pound Units, and Certain Other Units)*(PDF or hardcopy).*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. Retrieved 22 December 2019. [1], 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.