Gas is physically delivered and measured in units of 100 cubic feet (Ccf) or 1,000 cubic feet (Mcf). Heating and Cooling: British Thermal Unit (BTU)
Depending on the form of energy you use, your bill will be calculated using different standard measurements.
The energy used by a 1,000-watt device running for exactly one hour.
The amount of heat needed to raise the temperature of one pound of water by one degree Fahrenheit.
The price you pay isn't just for the energy itself; it is split into two main components.
Large industrial users or power plants may use Megawatt-hours (MWh) or Gigawatt-hours (GWh). Natural Gas: Therms or Cubic Feet