1 myriametre

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The Strait of Gibraltar is 13 kilometres narrow

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

[edit] Conversions

10 kilometres is equal to:

10,000 metres
6.2 miles
1 mil, unit of measure commonly used in Norway^{[citation needed]} and Sweden^[1]
1 peninkulma, unit of measure commonly used in Finland; earlier peninkulma was 10.688 km^{[citation needed]}
1 farsang, unit of measure commonly used in Iran and Turkey^{[citation needed]}

42.195 km^{[note 1]} — length of the Marathon,^[2] the longest mainstream long-distance road running event^{[needs citation]}

18 km — cruising altitude of Concorde
27 km — circumference of the Large Hadron Collider, as of 2009^[update] the largest and highest energy particle accelerator
30 km — length of the longest man made dike enclosed by water on two sides, the Afsluitdijk^{[citation needed]}
31.3 km — highest parachute jump (Joseph Kittinger)^{[citation needed]}
34.668 km — highest manned balloon flight (Malcolm D. Ross and Victor E. Prather)^{[needs citation and date(s) when true]}
38 km — Length of the world's longest bridge, the Second Lake Pontchartrain Causeway in Louisiana, USA
38.422 km — length of the Lake Pontchartrain Causeway, as of June 2006, the longest bridge in the world^{[needs citation and date(s) when true]}
39 km — undersea portion of the Channel tunnel
53.9 km — length of the Seikan Tunnel, as of February 2006^[update], the longest in the world^{[needs citation]}
77.1 km — total length of the Panama Canal^{[citation needed]}

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 at the Strait of Dover
50 km — approximate height of the stratosphere

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 above the Mars reference level,^[3]^[4] the highest known mountain of the solar system
43 km — diameter difference of Earth's equatorial bulge
66 km — diameter of Naiad, the innermost of Neptune's moons

Click on the thumbnail image to jump to the desired Human-scale order of length magnitude article: top-left is 1E-6m, lower-right is 1E5m.

Orders of magnitude for length in E notation, shorter than one metre:
<-24	-24	-23	-22	-21	-20	-19	-18	-17	-16	-15	-14	-13	-12	-11	-10	-9	-8	-7	-6	-5	-4	-3	-2	-1	0
longer than 1 metre:
1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26

^ Hans Högman (2007-01-21), Measurements and weights, old Swedish, archived from the original on 2009-04-25, http://www.webcitation.org/5gJ2hN0DU, retrieved on 2009-04-20, "previously in common use: ... Swedish "mil" ... in the old days = ... 10.688 meters ... This "mil" was introduced in 1699 as a standard "mil" and was to represent the distance between the inns. Before 1699 the "mil" had different lengths in different parts of Sweden. Today in the metric system: 1 "mil" = 10 kilometers"
^ "IAAF Competition Rules 2008" (pdf). IAAF. 195. Archived from the original on 2009-04-25. http://www.webcitation.org/5gJ2hogSd. Retrieved on 2009-04-20.
^ Highest and lowest points on Mars NASA
^ Plescia, Jeff (1997-10-01). "Height of Martian vs. Earth mountains". Questions and Answers about Mars terrain and geology. http://quest.arc.nasa.gov/mars/ask/terrain-geo/Height_of_Martian_vs__Earth_mountains.txt. Retrieved on 2009-04-20.