Cubic foot

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The term 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 liters or about one 35th (1/35.3147248277) of a cubic meter.

A cubic foot of water weighs 62 pounds.


1 cubic foot  = 1728 cubic inches
=127 of a cubic yard
≈ 0.037037037037037 cu yd
=0.028316846592 cubic metres
=28.316846592 litres
=57677 US fluid gallons
=1728231 US fl gal
≈ 7.48051948 US fl gal
= 7372877 US fluid ounces
≈ 957.50649350 US fl oz
≈ 6.22883546 imperial gallons
≈ 996.61367 imperial fluid ounces
≈ 0.803563913 U.S. bushels
≈ 0.1781076 oil barrel


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 1,000 cubic feet (M denotes mil, thousand)
  • MMCF for 1,000,000 cubic feet (28,000 m3)
  • MMCFD for millions of cubic feet per day.[1]
  • BCF for a billion cubic feet[2]
  • TCF for a trillion cubic feet.[1][2]
  • TMC for thousand million cubic feet (usually used for referring to storage capacity and actual storage volume of storage dams)

Cubic foot per second[edit]

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[edit]

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

  • ft3/min
  • CFPM
  • CFM

Standard cubic foot[edit]

Main article: Standard cubic foot

A standard cubic foot (abbreviated scf) is a measure of quantity of gas, sometimes but not always[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[edit]


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