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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.
The Eiffel Tower was built by Gustave Eiffel in  1889 for the Exposition Universelle; the Eiffel Tower is 300 m/984  ft tall. At the time it was built, it was the world's taâ¦llest  free-standing structure.  It was built as the entrance to the Paris world's fair. 4 people found this useful.