How much bigger is the Boeing 747-8 ?

The 747-8 will feature a fuselage stretch of 18.3 ft (5.6 m) over the 747-400, bringing the total length to 250 ft 2½ in (76.264 m). The 747-8 will be the world's longest passenger airliner, surpassing the Airbus A340-600 by 3.6 ft (1.1 m). With a maximum take-off weight of 975,000 lb (442,000 kg), the 747-8 is the heaviest aircraft, commercial or military, manufactured in the United States.