Orders of magnitude (length)

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List of Orders of Magnitude for length

Decade of Length	Length using SI prefixes	Length of Item	Item
10-35 m		1.6×10-35 m	Planck length; lengths smaller than this do not make any physical sense, according to current theories of physics
...
10-24 m	1 yoctometre (ym)
10-21 m	1 zeptometre (zm)
10-18 m	1 attometre (am)		size of a quark
			sensitivity of the LIGO detector for gravitational waves
10-15 m	1 femtometre (fm)		size of a proton
			classical electron
10-14 m	10 fm		scale of the atomic nucleus
			range of the weak nuclear force
10-13 m	100 fm		Compton wavelength of electron
10-12 m	1 picometre (pm)		distance between atomic nuclei in a white dwarf
			wavelength of gamma rays
		5 pm	wavelength of shortest X-rays
10-11 m	10 pm	25 pm	radius of hydrogen atom
		31 pm	radius of helium atom
10-10 m	100 pm		wavelength of X rays
		100 pm	1 Ångström;
		100 pm (0.1 nm)	covalent radius of sulfur atom
		126 pm (0.126 nm)	covalent radius of ruthenium atom
		135 pm (0.135 nm)	covalent radius of technetium atom
		153 pm (0.153 nm)	covalent radius of silver atom
		154 pm (0.154 nm)	length of a typical covalent bond (C-C).
		155 pm (0.155 nm)	covalent radius of zirconium atom
		175 pm (0.175 nm)	covalent radius of thulium atom
		225 pm (0.225 nm)	covalent radius of caesium atom
		500 pm (0.50 nm)	width of protein α helix;
10-9 m	1 nanometre (nm)	2 nm	diameter of DNA helix
10-8 m	10 nm	20 nm	thickness of bacterial flagellum
		40 nm	extreme ultraviolet wavelength
		90 nm	human immunodeficiency virus (HIV) (generally, viruses range in size from 20 nm to 450 nm)
		100 nm	90% of particles in wood smoke are smaller than this
10-7 m	100 nm		size of chromosomes
		100 nm	maximum particle size that can fit through a surgical mask
		120 nm	maximum particle size that can fit through a ULPA filter[1]
		280 nm	near ultraviolet wavelength
		300 nm	maximum particle size that can fit through a HEPA filter
		380-430 nm	wavelength of violet light -- see color and optical spectrum
		430-450 nm	wavelength of indigo light
		450-500 nm	wavelength of blue light
		500-520 nm	wavelength of cyan light
		520-565 nm	wavelength of green light
		565-590 nm	wavelength of yellow light
		590-625 nm	wavelength of orange light
		625-740 nm	wavelength of red light
10-6 m	1 micrometre aka micron (µm)	1-10 µm	diameter of typical bacterium
		1.55 µm	wavelength of light used in optical fibre
		6-8 µm	diameter of a human red blood cell
		6 µm	anthrax spore
		7 µm	width of strand of spider web [1]
		7 µm	diameter of the nucleus of typical eukariotic cell
10-5 m	10 µm	10 µm	typical size of a fog, mist or cloud water droplet
		10 µm	width of cotton fibre
		10.6 µm	wavelength of light emitted by a carbon dioxide laser
		12 µm	width of acrylic fibre
		13 µm	width of nylon fibre
		14 µm	width of polyester fibre
		15 µm	width of silk fibre
		17 µm	dust mite excreta ¹
		20 µm	width of wool fibre
		25.4 µm	1/1000 inch, commonly referred to as 1 mil
		50 µm	typical length of Euglena gracilis, a flagellate protist
		80 µm	average width of human hair (ranges from 18 to 180 µm)
10-4 m	100 µm	125 µm	dust mite
		200 µm	typical length of Paramecium caudatum, a ciliate protist
		300 µm	diameter of Thiomargarita namibiensis, the largest bacterium ever discovered
		500 µm	MEMS micro-engine
		500 µm	diameter of a human ovum
		500 µm	typical length of Amoeba proteus, an amoeboid protist
10-3 m	1 millimetre (mm)	2.54 mm	distance between pins in old DIP (dual-inline-pins) electronic components
		5 mm	length of average red ant
		7.62 mm	common military ammunition size
10-2 m	1 centimetre (cm)	1.5 cm	length of a large mosquito
		2.54 cm	1 inch
		3.1 cm	1 attoparsec (10-18 parsecs)
		4.267 cm	diameter of a golfball
10-1 m	1 decimetre (dm)	10 cm	wavelength of the highest UHF radio frequency, 3 GHz
		10 cm	diameter of the cervix upon entering the second stage of labour
		10.16 cm	Hand using in measuring height of horses (4 inches)
		12 cm	wavelength of the 2.45 GHz ISM radio band
		15 cm	height of a Lilliputian from Gulliver's Travels
		30.48 cm	1 foot
		50-65 cm	a pizote's tail
		66 cm	length of the longest pine cones (produced by the sugar pine)
		89 cm	average adult height of a Hobbit
		90 cm	average length of a rapier, a fencing sword
		91 cm	1 yard
1 m	1 metre	1 m	wavelength of the lowest UHF and highest VHF radio frequency, 300 MHz
		1.7 m (5 feet 7 inches)	average person's height
		1.435m	Standard gauge of railway track
		2.77 - 3.44 m	wavelength of the broadcast radio FM band 108 - 87 MHz
		3.048 m (10 feet)	height of the basket in basketball
		5.5 m	height of tallest animal, the giraffe
10 m	1 decametre (dam)	10 m	wavelength of the lowest VHF and highest shortwave radio frequency, 30 MHz
		18.44 m	distance between the pitcher's rubber and home plate on a baseball field
		20 m	length of a cricket pitch
		21 m	height of High Force waterfall in England.
		23 m	height of the obelisk of the Place de la Concorde, Paris.
		25 m	wavelength of the broadcast radio shortwave band at 12 MHz
		27.43 m	distance between bases on a baseball field
		30 m	length of a blue whale, the largest animal
		31 m	wavelength of the broadcast radio shortwave band at 9.7 MHz
		40 m	average depth beneath the seabed of the Channel tunnel
		49 m	width of an American football field (53 1/3 yards)
		49 m	wavelength of the broadcast radio shortwave band at 6.1 MHz
		52 m	height of Niagara Falls
		55 m	height of the Leaning Tower of Pisa
		60 m	Pyramid of Djoser
		70 m	width of soccer field
		70 m	length of the Bayeux Tapestry
		91.44 m	length of an American football field (100 yards, measured between the goal lines)
100 m	1 hectometre (hm)	100 m	wavelength of the lowest shortwave radio frequency and highest medium wave radio frequency, 3 MHz
		105 m	length of a soccer field
		109.73 m	total length of an American football field (120 yards, including the end zones)
		112.34 m	height of the world's tallest tree, a Coast redwood
		137 m	height of the Great Pyramid of Giza
		147 m	original height of the Great Pyramid of Giza
		168 m	height of the Bungsberg, highest point in Schleswig-Holstein, Germany
		187 m	shortest wavelength of the broadcast radio AM band, 1600 kHz
		193 m	the approximate length of New Jersey State Highway 59
		244 m	height of the City Gate building in Ramat-Gan, Israel
		300 m	height of the Eiffel Tower
		340 m	distance sound travels in air in one second; see speed of sound
		400-500 m	approximate heights of the world's tallest skyscrapers of the past 70 years.
		541 m (1,776 ft)	height of the planned Freedom Tower at the World Trade Center site
		553.33 m	height of the CN Tower, the world's tallest free-standing land structure
		555 m	longest wavelength of the broadcast radio AM band, 540 kHz
		647 m	height of the Warszawa radio mast, formerly the tallest man-made structure, collapsed in 1991
1,000 m	1 kilometre (km)	1 km	wavelength of the lowest medium wave radio frequency, 300 kHz
		1609 m	1 international mile
		1852 m	1 nautical mile
		8850 m	height of the highest mountain, Mount Everest				Webmasters: Add your website here: