What is 'MCF - Thousand Cubic Feet'

MCF is an abbreviation derived from the Roman numeral 'M' for a thousand, put together with cubic feet (CF) to measure a quantity of natural gas. A natural gas well that produces 400 MCF of gas per day operates with a daily production rate of 400,000. In terms of energy output, a thousand cubic feet (MCF) of gas is equal to approximately 1,000,000 BTU (British Thermal Units). One BTU is the amount of heat required to raise the temperature of one pound of water by one degree Fahrenheit at sea level (roughly equivalent to a kitchen match). Many people think the M represents the English word for million, but one million cubic feet of gas is instead denoted as MMCF, where the two Ms mean "a thousand thousand" or 1,000,000, with each M representing three zeros.

BREAKING DOWN 'MCF - Thousand Cubic Feet'

MCF is the conventional way to measure natural gas in the United States, which uses the imperial measuring system. In Europe, where the metric system is used, the abbreviation most commonly used is thousand of cubic meters or MCM. Oil and gas financial analysts need to be especially careful when analyzing companies' quarterly results to avoid mixing up various units. For example, it is quite easy to overlook the fact that U.S. companies will report in MCF, while European companies often report in MCM. This makes quite a difference because 1 MCM = 35.3 MCF. To help analysts deal with these reporting differences, some companies provide analysts with an approximate conversion factor guide. In these guides there are typically six specific conversion factors for natural gas (cubic meters, cubic feet, tons of oil equivalent, tons of liquefied natural gas, BTU and barrels of oil equivalent).

​Most of the major international oil and gas companies provide standardized reports to help analysts and investors accurately assess these figures. This is partly a regulatory requirement, with the U.S. Securities and Exchange Commission (SEC) stipulating that foreign companies with stock listed on U.S. exchanges file standardized reports on an annual basis, called a 20-F. This is equivalent to the 10-K filing for U.S. companies and provides investors with oil and gas production and reserve statistics published with imperial measurements to allow like-for-like comparison. Investors in the emerging markets of Russia, Africa or Latin America often receive reports with data represented in the metric system, which is a global measurement system. Analysts of these companies will need to use conversion tables to accurately quantify and compare them to more sophisticated international operators.

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