1 hectometre

To compare different orders of magnitude this page lists lengths between 100 metres and 1000 metres (1 kilometre).

Conversions

100 metres (sometimes termed a hectometre) is equal to:

100 metres — wavelength of the highest mediumwave radio frequency, 3 MHz
100 metres — Spacing of location marker posts on British motorways.
138.8 metres — height of the Great Pyramid of Giza (Pyramid of Cheops)
139 metres — height of the world's tallest roller coaster, Kingda Ka^[1]
187 metres— shortest wavelength of the broadcast radio AM band, 1600 kHz
202 metres — length of the Széchenyi Chain Bridge connecting Buda and Pest
320.75 metres — height of the Eiffel Tower(including antenna) ^[2]
328 metres — height of Auckland's Sky Tower, the tallest free-standing structure in the Southern Hemisphere
341 metres — height of the world's tallest bridge, the Millau Viaduct
390 metres — height of the Empire State Building
400–800 metres — approximate heights of the world's tallest skyscrapers of the past 80 years.
458 metres — length of the Knock Nevis, the world's largest supertanker
555 metres — longest wavelength of the broadcast radio AM band, 540 kHz
630 metres — height of the KVLY-TV mast, second tallest structure in the world
646 metres — height of the Warsaw radio mast, the world's tallest structure until its collapse in 1991
828 metres — height of Burj Khalifa, world's tallest structure on 17 January 2009^[3]
1000 metres — wavelength of the lowest mediumwave radio frequency, 300 kHz

100 metres — the distance a very fast human being can run in about 10 seconds
100.584 metres — length of a Canadian football field between the goal lines (110 yards)
91.5 metres – 137 metres — length of a soccer field
105 metres — length of a typical football field
109.73 metres — total length of an American football field (120 yards, including the end zones)
110 – 150 metres the width of an Australian football field
135 – 185 metres the length of an Australian football field
137.16 metres — total length of a Canadian football field, including the end zones (150 yards)

115.5 metres — height of the world's tallest tree in 2007, the Hyperion sequoia
310 metres — maximum depth of Lake Geneva
340 metres — distance sound travels in air at sea level in one second; see speed of sound
979 metres — height of the Salto Angel, the world's highest free-falling waterfall (Venezuela)

270 metres — length of 99942 Apophis, the smallest known asteroid
540 metres — length of 25143 Itokawa,^[4] the smallest asteroid visited by a spacecraft