# Trillion Cubic Feet Per Day (Tcf/d)

## Definition - What does Trillion Cubic Feet Per Day (Tcf/d) mean?

Trillion Cubic Feet Per Day abbreviated as Tcf/day or Tcfd is a volume measurement unit of the amount of natural gas produced every day. A trillion cubic feet (1,000,000,000,000 cubic feet) 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.

## Petropedia explains Trillion Cubic Feet Per Day (Tcf/d)

The volume of natural gas is either measured in Billion cubic feet (Bcf) or Trillion cubic feet (Tcf). Since natural gas produced from oil or gas wells is produced and metered daily, its volumetric measurement is measured on a daily basis and thus, it is noted as Tcf per day. During custody transfer of natural gas between two parties, the price paid by one party however, does not depend on the volume of natural gas transferred in Tcf. It depends on the enthalpy or the amount of heat or energy the natural gas being traded will generate when it is burnt, i.e., the price or the market value of natural gas depends on the British Thermal Units (Btu).

• 1 cubic foot (cf) = 1,027 Btu
• 100 cubic feet (1 hcf) = 1 therm (approximate)
• 1,000 cubic feet (1 Mcf) = 1,027,000 Btu
• (1 MMBtu) 1,000 cubic feet (1 Mcf) = 1 dekatherm (10 therms)
• 1 million (1,000,000) cubic feet (1 Mmcf) = 1,027,000,000 Btu
• 1 billion (1,000,000,000 cubic feet (1 bcf) = 1.027 trillion Btu
• 1 trillion (1,000,000,000,000) cubic feet (1Tcf) = 1.027 quadrillion Btu