MMBtu

MMBtu stands for Million British thermal units and is a unit of energy widely used in the United States to describe the energy content of fuels and the price of natural gas and related energy commodities. One MMBtu equals 1,000,000 Btus. The Btu is the amount of heat required to raise the temperature of one pound of water by one degree Fahrenheit, so the MMBtu is a measure of heat energy.

In SI terms, 1 Btu is about 1055.06 joules, which makes 1 MMBtu approximately 1.055 gigajoules. In electrical energy terms, 1 MMBtu is roughly 293 kilowatt-hours (kWh). The unit is commonly used in energy markets and utility planning, especially for natural gas, coal, and fuel oil.

Energy content per volume of natural gas varies with composition and conditions, but a typical value is about 1,000 Btu per cubic foot. Consequently, 1 MMBtu is roughly 964 cubic feet of gas (about 0.964 thousand cubic feet) at standard conditions. Because of this variability, energy quantities are often expressed in Btu per volume or in MMBtu, with prices quoted as dollars per MMBtu ($/MMBtu).

Note on terminology: MBtu is a less standardized term and can be ambiguous, sometimes interpreted as 1,000 Btus in older usage. MMBtu, meaning million Btus, is the preferred and clearer unit in modern energy contexts.