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  2. Orders of magnitude (length) - Wikipedia

    en.wikipedia.org/wiki/Orders_of_magnitude_(length)

    The centimetre (SI symbol: cm) is a unit of length in the metric system equal to 10−2 metres (⁠ 1 100 ⁠ m = 0.01 m). To help compare different orders of magnitude, this section lists lengths between 10 −2 m and 101 m (1 cm and 1 dm). 1 cm – 10 millimetres. 1 cm – 0.39 inches. 1 cm – edge of a square of area 1 cm 2.

  3. Metre - Wikipedia

    en.wikipedia.org/wiki/Metre

    The metre (or meter in US spelling; symbol: m) is the base unit of length in the International System of Units (SI). Since 2019, the metre has been defined as the length of the path travelled by light in vacuum during a time interval of ⁠ 1 / 299 792 458 ⁠ of a second, where the second is defined by a hyperfine transition frequency of caesium.

  4. List of tallest buildings - Wikipedia

    en.wikipedia.org/wiki/List_of_tallest_buildings

    The 828-metre (2,717 ft) tall Burj Khalifa in Dubai has been the tallest building since 2010. [1] The Burj Khalifa has been classified as megatall. [2] A diagram showing the tallest buildings as of 2024. This is a list of the tallest buildings. Tall buildings, such as skyscrapers, are intended here as enclosed structures with continuously ...

  5. Fathom - Wikipedia

    en.wikipedia.org/wiki/Fathom

    Miners also use it as a unit of area equal to 6 feet square (3.34 m 2) in the plane of a vein. [2] In Britain, it can mean the quantity of wood in a pile of any length measuring 6 feet (1.8 m) square in cross section. [2] In Central Europe, the klafter was the corresponding unit of comparable length, as was the toise in France.

  6. Foot (unit) - Wikipedia

    en.wikipedia.org/wiki/Foot_(unit)

    0.3048 m. 30.48 cm. 304.8 mm. The foot (standard symbol: ft) [1][2] is a unit of length in the British imperial and United States customary systems of measurement. The prime symbol, ′, is commonly used to represent the foot. [3] In both customary and imperial units, one foot comprises 12 inches, and one yard comprises three feet.

  7. List of mountains by elevation - Wikipedia

    en.wikipedia.org/wiki/List_of_mountains_by_elevation

    There are 14 mountains over 8,000 metres (26,247 ft), which are often referred to as the Eight-thousanders. (Some people have claimed there are six more 8,000m peaks in Nepal, making for a total of 20. [1])

  8. League (unit) - Wikipedia

    en.wikipedia.org/wiki/League_(unit)

    From 1630 to 1718 a millia was 5,564 feet (1,696 metres), making a geographical league of four millias equal 22,256 feet (6,784 m or 3.663 modern nautical miles). But from 1718 through the 1830s the millia was defined as the equivalent of just over 5,210 feet, giving a shorter geographical league of just over 20,842 feet (6,353 m or 3.430 ...

  9. Metre sea water - Wikipedia

    en.wikipedia.org/wiki/Metre_sea_water

    U.S. customary. ≈ 0.444 44 psi. The metre (or meter) sea water (msw) is a metric unit of pressure used in underwater diving. It is defined as one tenth of a bar. [1][2] The unit used in the US is the foot sea water (fsw), based on standard gravity and a sea-water density of 64 lb/ft 3. According to the US Navy Diving Manual, one fsw equals 0. ...