## DEFINITION of 'Trillion Cubic Feet - Tcf'

A volume measurement used by the oil and gas industry. A trillion cubic feet (1,000,000,000,000 cubic feet) is a volume measurement of natural gas that is equivalent to approximately one Quad. A Quad is an abbreviation for a quadrillion (1,000,000,000,000,000) Btu's. A Btu (British Thermal Unit) is a unit of measurement for energy, representing the amount of heat that is needed to raise the temperature of one pound of water by one degree Fahrenheit.

## BREAKING DOWN 'Trillion Cubic Feet - Tcf'

Trillion cubic feet is commonly called abbreviated Tcf. Similarly, Bcf refers to a billion cubic feet, a gas measurement equal to approximately one trillion (1,000,000,000,000) Btu's. Mcf stands for one thousand cubic feet, a measure that is used more commonly in the low volume segments of the gas industry, such as stripper well production.

Within the oil and gas industry, units of measurement are represented by letters where M= one thousand, MM = one million, B = one billion and T = one trillion. Any of these can appear before certain terms, such as MMBOE (million barrel of oil equivalent) or Tcf (trillion cubic feet).