With the lowest operating cost per ton-mile in the industry, the 747-400ER Freighter improves on what is already the most capable cargo transport in the industry. The 747-400ER Freighter has a maximum takeoff weight of 910,000 pounds (412,770 kg). This takeoff weight increase allows the 747-400ER Freighter to fly an additional 525 nautical miles (972 km), or, it can carry an additional 22,000 pounds (9,980 kg) of payload on long-range flights at maximum takeoff weight. Along with earlier versions, 747 Freighters -- about 250 in all -- carry half of all the world's freighter air cargo.