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The metal structure of the Eiffel Tower has a mass of 7300 tons, or 7.3 million kilograms. The design of the tower is very space-efficient: if you melted down the pure iron* that it is made of, it would occupy a volume of only 930m3, equivalent to a sphere with a radius of just six metres.
1 Construction of the Eiffel Tower cost 7,799,401.31 French gold francs in 1889. 2  The Eiffel Tower is 1,063 feet (324 meters) tall, including the antenna at the top. 3  Without the antenna, it is 984 feet (300 m).