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The Boeing 737-800 is an example of an average sized airplane. It has a maximum takeoff weight of about 80,000 kg (175,000 lbs). This includes the weight of the plane, which is about 41,000 kg (90,000 lbs), and the weight of the fuel which is about 18,000 kg (40,000 lbs). This leaves about 20,000 kg (45,000 lbs) for passengers, cargo, and crew.