The original 747-100, launched in 1970, weighs 385,000 pounds when empty and has a maximum takeoff weight of 750,000 pounds, according to Airliners.net. The 747-400 model, which entered service in 1989, has an empty weight of 399,000 pounds.
The most recent variant this aircraft, the 747-8, was unveiled in 2005 and has a maximum take-off weight of 987,000 pounds, according to Boeing. The 747-8 is capable of carrying a fuel load of 422,000 pounds, enough to enable it to fly up to 7,790 nautical miles without refueling. This means the aircraft can service extremely long routes, such as Los Angeles to Melbourne in Australia, non-stop.