Liquid natural gas (LNG) doesn't have a single, fixed BTU content. The BTU content of LNG varies depending on its composition, which can differ based on the source of the natural gas and the processing methods used.

Here's a breakdown:

* Natural Gas Composition: LNG is primarily methane (CH4), but it also contains other hydrocarbons like ethane, propane, butane, and pentane. The higher the concentration of heavier hydrocarbons, the higher the BTU content.

* BTU Range: Typically, the BTU content of LNG falls within the range of 900-1,100 BTUs per cubic foot.

* Conversion: Remember that BTU values for LNG are usually expressed in terms of BTUs per cubic foot (BTU/ft³). To compare with the BTU content of natural gas in its gaseous state, it's important to consider the conversion factor based on the density of LNG.

To get a precise BTU content for a specific LNG sample, you would need information on its exact composition.

Here are some additional points:

* LNG vs. Natural Gas: The BTU content of LNG is higher than natural gas in its gaseous state because the liquefaction process compresses the gas molecules, resulting in a higher density of energy.

* BTU Measurement: The measurement of BTU content is standardized using calorimeters, which determine the amount of heat released when a substance is burned.

If you need a specific BTU value for LNG, it's best to consult with a supplier or refer to the technical specifications of the LNG source.