How much does the Eiffel Tower expand by in the summer?

In the summer, this famous tower can grow up to 15 cm taller! How does this happen? Heat gain causes matter (solid, liquid and gas) to expand. The hot weather in the summer causes the Eiffel Tower to gain heat.



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A few millimeters gained in summer, but lost in winter! This is a natural physical phenomenon called thermal expansion. Heat causes an increase in volume that makes the Eiffel Tower a few millimeters taller. This expansion also causes the Tower to tilt slightly away from the sun.

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Thermal expansion is when a material changes dimensions while it undergoes temperature changes. The tower expands and contracts 15 cm from the hottest to the coldest day.

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What causes the Eiffel Tower to be slightly taller during the summer? Sun's and summer heat, heats the tower's metal frame, making the metal beams to expand and thus gain some height. In summer, or very hot days, the tower can swell in height by as much as 15 centimeters (6 inches).

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Metal absorbs the heat, causing the Eiffel Tower to grow by 6.75 inches. On the other hand, it shrinks during the winter due to thermal contraction caused by freezing weather. So, the Tower shrinks between six and seven inches, depending on the weather conditions.

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In fact, the Tower has been repainted for over 130 years, about once every 7 years. So if it is repainted, the Eiffel Tower can last... forever.

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Metal absorbs the heat, causing the Eiffel Tower to grow by 6.75 inches. On the other hand, it shrinks during the winter due to thermal contraction caused by freezing weather. So, the Tower shrinks between six and seven inches, depending on the weather conditions.

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What Are the 11 Most Interesting Facts About the Eiffel Tower?
  • It Was Designed by Gustave Eiffel. ...
  • It Took 22 Months to Complete. ...
  • The Eiffel Tower Is Made of Iron. ...
  • The Eiffel Tower Has Three Floors. ...
  • It's as heavy as an Entire Freight Train. ...
  • The Eiffel Tower Has to be Repainted Every 7 Years.


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A few millimeters gained in summer, but lost in winter! This is a natural physical phenomenon called thermal expansion. Heat causes an increase in volume that makes the Eiffel Tower a few millimeters taller.

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While the Tower has a total of 1,665 steps from the ground to the top, you can only climb 674 of them, from the ground to the second floor (327, then 347 steps). You cannot take the stairs all the way to the top from the second floor, as this section is not open to the public for safety reasons.

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So the Eiffel Tower is the shortest of the three buildings. The first picture shows just the Eiffel Tower. The second picture shows the Eiffel Tower and the Burj Khalifa, with 2\frac{1}{2} Eiffel Towers in the Burj Khalifa.

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The Eiffel Tower is the eldest. The tallest tower is Burj Khalifa (828 metres) and the shortest is the Bratislava UFO (95 metres).

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You'll be able to see the well known Iron Lady lit up every day from sunset to 1AM. During summer, it turns of one hour later at 2AM.

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The Tower lights and beacon are lit up every evening from dusk until 11.45pm. As soon as it gets dark, the Eiffel Tower's golden lighting switches on automatically within less than 10 minutes, thanks to light-sensitive twilight sensors.

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Hours subject to safety recommendations. For safety reasons, especially concerns arising from inclement weather or heavy visitor traffic, admission and hours of operation at the Eiffel Tower may be temporarily restricted.

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The Eiffel Tower's Illuminations. Every evening, the Eiffel Tower is adorned with its golden covering and sparkles for 5 minutes every hour on the hour, while its beacon shines over Paris.

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The world would have to wait more than forty years before seeing the Tower dethroned by the Chrysler Building in New York (319 m), which was overtaken in 1949 by the Empire State Building (381 m).

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Because Steel expands in hot and contracts in cold. So, The Eiffel Tower is 17 centimetres taller in summer than winter. A few centimetres gained in summer, but lost in winter!

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A few millimeters gained in summer, but lost in winter! This is a natural physical phenomenon called thermal expansion. Heat causes an increase in volume that makes the Eiffel Tower a few millimeters taller. This expansion also causes the Tower to tilt slightly away from the sun.

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It was met immediately with tremendous success. Only intended to last 20 years, it was saved by the scientific experiments that Eiffel encouraged, and in particular by the first radio transmissions, followed by telecommunications.

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The Eiffel Tower is made of puddle iron, a material that could last almost forever if it is repainted regularly. However, several factors pose a threat, including rust, pollution inherent to its location in a big city, bird droppings and the weather.

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City of Paris ownership Today, the City of Paris owns the Tower and has entrusted its management to a development company (SETE: Société d'Exploitation de la Tour Eiffel) of which it owns 99% of the capital. Bertrand Lemoine is an architect, engineer and historian.

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