How much does the pentagon weigh?

Answer 1

The Pentagon was built using 680,000 tons of dredged sand, to which was added concrete, water, and steel. Wet sand is typically about 2,080 kg per m^3, while reinforced concrete is more like 2,500 kg/m3. Thus we can multiply the 680,000 tons by 1.20 (from 2,500 / 2,080) and arrive at an estimate of roughly 820,000 tons.

Answer 2

The Pentagon, which serves as the headquarters of the United States Department of Defense, does not have a widely published official weight. However, estimates suggest that the building weighs approximately 680,000 tons (or about 1.36 billion pounds) due to its massive concrete structure and extensive use of steel. This weight can vary slightly depending on the specific construction materials and modifications made over time.