Basic aircraft empty weight

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Basic aircraft empty weight is the weight of an aircraft without taking into account any baggage, passengers, or usable fuel. Basic empty weight includes all fluids necessary for operation such as engine oil, engine coolant, and unusable fuel.

Some manufacturers define Basic Empty Weight as "The Standard Empty Weight of the aircraft plus the weight of optional equipment. [i.e. GPS, cargo basket, spotlight.]"

"Standard Empty Weight" being the weight of the aircraft with full operating fluids, full engine oil and unusable fuel. Also may be referred to as "Factory Weight" because this is the weight of an aircraft when it leaves the factory.