What Is the Unit of Measurement for Natural Gas?

The unit of measurement for volume of natural gas is cubic feet, and the unit of measurement for the energy content of natural gas is a British Thermal Unit, or BTU. The term therm applies to 100 cubic feet of natural gas, and 1,000 cubic feet is an mcf.

A British Thermal Unit is defined as the quantity of heat needed to increase the temperature of 1 pound of water 1 degree Fahrenheit when the water is at its maximum density. The qualitative amount of BTUs per cubic foot of natural gas varies depending on where the gas originated, but on average, there are 1,000 BTUs of heat energy per 1 cubic foot of natural gas.