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To help compare different orders of magnitude this page lists lengths between 10 and 100 km (10⁴ to 10⁵ m).

Distances shorter than 10 km

[edit] Conversions

10 km is equal to:

• 10,000 metres
• 6.2 miles
• 1 mil, unit of measure commonly used in Norway and Sweden
• 1 peninkulma, unit of measure commonly used in Finland; earlier peninkulma was 10.688 km
• 1 farsang, unit of measure commonly used in Iran and Turkey

[edit] Sports

• 42 km — length of a marathon course

[edit] Human-built structures

• 18 km — cruising altitude of Concorde
• 38 km — Length of the world's longest bridge, the Second Lake Pontchartrain Causeway in Louisiana, USA
• 39 km — undersea portion of the Channel tunnel

[edit] Nature

• 10 km — Height of Mauna Kea in Hawaii, measured from its base on the ocean floor
• 11 km — deepest known point of the ocean, Challenger Deep in the Mariana Trench
• 11 km — average height of the troposphere
• 21 km — length of Manhattan
• 23 km — depth of the largest earthquake ever recorded in the United Kingdom, in 1931 at the Dogger Bank of the North Sea
• 34 km — Narrowest width of the English Channel
• 50 km — approximate height of the stratosphere

[edit] Astronomical

• 10 km — diameter of the most massive neutron stars (3 – 5 solar masses)
• 13 km — mean diameter of Deimos, the smaller moon of Mars
• 20 km — diameter of the least massive neutron stars (1.44 solar masses)
• 20 km — diameter of Leda, one of Jupiter's moons
• 20 km — diameter of Pan, one of Saturn's moons
• 22 km — diameter of Phobos, the larger moon of Mars
• 27 km — height of Olympus Mons on Mars, measured from its base
• 43 km — diameter difference of Earth's equatorial bulge
• 66 km — diameter of Naiad, the innermost of Neptune's moons

Distances longer than 100 km

[edit] See also

• Orders of magnitude (length)