The short answer: A typical skyscraper weighs roughly 200,000 to 500,000 tons (180,000 to 450,000 metric tonnes), depending on its height, structural system, and materials. The figure counts the permanent structure — the steel frame, concrete floors, walls, and core — known as the dead load. The weight of people, furniture, and equipment (the live load) is added on top when engineers size the foundations.
Skyscraper weight by type
Weight scales with height and floor area. The table gives rough order-of-magnitude figures for common skyscraper sizes; exact weights vary with the structural system (steel frame, reinforced concrete, or composite).
| Building size (example) | Approximate weight |
|---|---|
| Mid-rise tower, ~20 stories | ~60,000–120,000 t |
| 50-story skyscraper | ~250,000–300,000 t |
| Supertall, ~100 stories (Empire State class) | ~330,000–365,000 t |
| Megatall (Burj Khalifa class) | ~450,000–500,000 t |
What affects skyscraper weight
- Height and floor count. Each additional floor adds structure, so weight grows roughly with the number of stories.
- Structural material. Reinforced-concrete towers are heavier than steel-framed ones of the same size; steel density is about 7,850 kg/m³ versus roughly 2,400 kg/m³ for concrete.
- Floor plate size. A wide footprint means more concrete per floor and a heavier building.
- Facade and finishes. Stone cladding is far heavier than a glass curtain wall.
- Foundation and core. Deep piles and a thick concrete core add substantial mass low in the building.
How skyscraper weight compares
A 300,000-ton skyscraper weighs about as much as 1,000 fully loaded Boeing 747s (each around 300 t at takeoff), or roughly 40,000 adult African elephants. The Empire State Building is often cited at about 365,000 t, while the Burj Khalifa is estimated near 500,000 t including its concrete and steel.
Frequently asked questions
How much does a 50-story skyscraper weigh?
A 50-story skyscraper typically weighs around 250,000 to 300,000 tons, including the steel frame, concrete floors, walls, and core. The exact figure depends on the floor area and whether the structure is steel or reinforced concrete.
Does the Empire State Building weigh more than the Burj Khalifa?
No. The Empire State Building is estimated at about 365,000 tons, while the much taller Burj Khalifa is estimated near 500,000 tons.
Why do skyscrapers need such deep foundations?
Because their immense dead and live loads must be transferred safely to stable ground. Deep piles and a thick concrete core spread the weight and resist wind and seismic forces.
