Though it is not easy to weigh a Boeing so easily yet it can be weighed it an indirect way by weighing each component used in its structure.
The accepted average weight of Jet A fuel is 6.84 pounds per gallon based on specific gravity (but varies based on temperature, additives, etc.) The Boeing 747-400ER can carry more than 63,500 gallons of fuel which is about 434,340 pounds fuel load weight. Information provided by Jet Advisors
10}Boeing 737-300 9}Boeing 737-400 8}Boeing 737-500 7}Boeing 737-600 6}Airbus A360 5}Airbus A370 4}Airbus A380 3}Antonov An22 2}Antonov An225 1}Antonov An22
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According to Boeing's website, "the 747-400ER is now the largest and fastest commercial airplane in the sky - cruising at Mach 0.85, or 85 percent of the speed of sound."
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396,890 kgs.
The Maximum Take-Off Weight for a Boeing 747-100 is 333, 390kg; a Boeing 747-200 and 747-300 is 377,842kg; a Boeing 747-400 is 396,890kg; a Boeing 747-400ER is 412,775kg and the Boeing 747-8I is 442,253kg.
67tonnes
The maximum take-off weight of a Boeing 747-400 is 875,000 lbs
The maximum takeoff weight for a Boeing 767 is 315,000 pounds, that is the heaviest the airplane can be upon takeoff.
The maximum take-off weight of a Boeing 747-400 is 875,000 lbs
the operating empty weight of a Boeing 767-200 is 80130kilograms
A Boeing 777-200's empty weight would weigh 297,300lbs.
The Boeing 777-200 is 247,200kg at the maximum takeoff weight while an empty one is 134,800kg.
The maximum take off weight is 875,000 lbs.
The max take off weight is 396,890 kgs.
Maximum takeoff weight for a Boeing 757-300 is 123,600 kg (272,500 lb)