1 kilometre
To help compare different orders of magnitude this page lists lengths between 1 kilometre and 10 kilometres (103 and 104metres).
Conversions
1 kilometre (unit symbol km) is equal to:
1,000 metres
0.621371 miles
1,093.61 yards
3,280.84 feet
39,370.1 inches
100,000 centimetres
1,000,000 millimetres
Side of a square of area 1 km2.
Radius of a circle of area π km2.
Human-defined scales and structures
1 km – wavelength of the highest long wave radio frequency, 300 kHz
1.280 km – span of the Golden Gate Bridge (distance between towers)
1.609 km – 1 mile
1.852 km – 1 nautical mile, equal to 1 arc minute of latitude at the surface of the earth
1.991 km – span of the Akashi Kaikyō Bridge
2.309 km – axial length of the Three Gorges Dam, the largest dam in the world
3.991 km – length of the Akashi Kaikyō Bridge, longest suspension bridge in the world as of December 2008
5.072 km – height of Tanggula Mountain Pass, below highest peak in the Tanggula Mountains, highest railway pass in the world as of August 2005