1 E4 m
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To help compare different orders of magnitude this page lists lengths between 10 and 100 km (104 to 105 m).
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[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
- 21 km — length of Manhattan
- 34 km — Narrowest width of the English Channel
[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
